It all begun in Keikei City in China.

News of a bio-luminescent baby being born spread like wildfire, shocking the nation. And then it started. Following that, "exceptional" individuals begun popping up all over the world. The cause was unclear. Time passed…

…and the "exceptional" became the norm.

Fantasy became reality.

At present, approximately 80% of the world's population consists of superhumans with special abilities, now commonly referred to as "Quirks". The world was in chaos. And in response, a profession that everyone once only dreamed about...

…entered the spotlight.

"Rimuru! Hey, Rimuru! Wake up, you lazy bum! It's morning and it's the day! You know, the day! That day! The day we've been looking forwards to for aaaages!"

Rimuru grumbled as she slowly opened her eyes in response to the energetic voice close by. Suddenly, she felt a great blast of light move into the room as Rimuru moved her arm up to protect her eyes. "Look it's so sunny as well! It's so perfect I could cry!" Exclaimed the voice. Rimuru squinted as she saw the figure sitting on the end of her bed energetically. Light skin. Bright blue eyes. Long, pink hair in twin tails.

"…Milim. What are you doing in my room? In fact, what are you doing in my house?" Rimuru managed to remark as she lowered her hand. Milim smiled cheerfully. "I came by early and your parents let me in. They said something like 'being so energetic for the big day was great' or something, and that I'd be a great influence. I didn't really know what they meant but whatever." Milim responded.

Rimuru sighed as she rested her face in her hands. "I really need to talk to them about that…nevermind." She remarked. Milim titled her head in confusion, a happy smile on her face. Rimuru climbed out of bed as Milim stood up and ran over towards Rimuru, grabbing and hugging her suddenly.

"Hey, can you turn into your true form? You've only had a Human form for a small while, but I already miss hugging your cute blob form. Please?"

Wow. Did she completely forget her priorities? Today is incredibly important. Milim can change her focus really fast…

"Don't be silly. I've got to get dressed, have a shower and get ready. You're already apparently ready so just wait around or something." Rimuru responded. Milim let go of Rimuru. "Awww…okay." She responded, turning and sitting down on one of the chairs in the room. Rimuru sighed as she looked into a nearby mirror, seeing her own face. Rimuru's light skin, her golden eyes, her bright blue hair and eyebrows.

That's right. Today is an incredibly important day. Because today…

…is the day Milim and I take the practical portion of the General Entrance Exam for U.A. High School. February 26th.

"Whoa…" Milim remarked as she looked up at the U.A. Building in front of them. They were both standing at the entrance, dressed and ready, with their backpacks as well. Rimuru smiled as she looked up towards U.A. as well. U.A. High School was an academy most famous for training prestigious heroes.

By extension, it was also very hard to get into. Apparently only 1 of 300 Applicants are accepted. This day was the turning point – about whether they could pass the Entrance Exam and be accepted into U.A., or fail it and be rejected. Though to be honest, Rimuru wasn't particularly worried…

"There's so many people here…do you think we'll see anyone we know?" Milim asked energetically as she turned towards Rimuru.

Milim Nava.

A friend I've had since childhood, and someone who's been very attached to me since then. We've known eachother since before we even acquired our Quirks at the age of four. We're both currently fifteen in age, and our friendship has remained solid for over a decade. Milim even opts to call me her 'best friend'.

And her Quirk? Well, it's not too complicated, but I'd rather not get into it right now. All I can say is that she is far stronger than I will ever be. Every time we've fought, I've lost. Badly. Milim is a walking catastrophe and yet she is also one of the most airheaded, simplistic and energetic people I've ever met.

She doesn't have any ironclad philosophies or ideologies she clings to – the reason she wants to become a hero is because she wanted to go to the same High School as me and follow the same career path as mine. Apparently. Yeah, she clings to me a lot and will annihilate anyone who hurts me. She's like a pet guard dog I guess, but she's a very loose cannon. Even I can't control her.

Though, it's definitely fun to have her around.

"Maybe. We'll have to see. Most of our friends chose other career paths since a lot of them didn't really have hero-suitable Quirks." Rimuru responded. Milim put her hands to her hips and leaned forwards as she looked towards Rimuru.

"Rimuru~, everyone we knew paled in comparison to your Quirk. It's kinda rude to say things like that." Milim responded, as Rimuru nervously chuckled. "Sorry sorry, that's not what I meant." She responded as Milim straightened her body.

My Quirk. While it's true that many other Quirks paled in comparison to mine, that doesn't mean it's a good Quirk. "Good" is simply a viewpoint. Because when I turned four, and my Quirk awakened for the first time, my entire life changed in a way which shocked even people who had experienced knowledge about Quirks.

Rimuru narrowed her eyes as she looked down towards her hands.

My body is not made of flesh. It was, a long time ago. When I was born, I was just like everyone else. But when my Quirk awakened, my entire body changed from flesh and blood to that of a unique substance.

It was only then that Rimuru Tempest was only truly born.

My entire body had become a light blue, almost slime-like substance. I had no Human form. But I could still think like any other person. And I still had vision. In fact, I gained complete 360-degree vision, and I no longer needed to eat, drink, sleep or even breathe. I couldn't feel pain anymore either, and my body could regenerate. My new body was very useful.

But it came with its own problems as well.

Because I had no Human form and was instead a blue blob, people saw me in a different way. They pretended not to, but it was obvious. Sure, there are plenty of people with other 'Mutant'-type Quirks which lead to unnatural body features such as additional limbs. But my Quirk was to a completely different scale.

For example, when a teacher would enter my class for the first time, the first thing they would always exclaim would be "WHY IS THERE A BLUE PILE OF GOO ON ONE OF THE TABLES?!" And then they'd realise that I was a student, and they'd apologise, but they'd still be uncomfortable. I can tell due to the "subtle" expressions and body movements they take which they attempted but failed miserably to hide.

Other students often had the same reaction, with many even no longer seeing me as Human and as some kind of 'lower life form', and become jealous that I possessed greater power than they did. Milim was one of the very few who were willing to be my friends, adapting fast to my new state and our friendship continued as if I had never even changed at all.

She is a true friend.

Luckily this problem will not present itself in U.A. High School, because not that long ago I finally acquired a Human form. While there are still characteristics from my goo form, such as my light-blue hair and eyebrows, nobody can notice that unless they are aware of my true form in the first place.

As to how I acquired a Human form, well that has connections to the true ability of my Quirk which I have yet to explain. And I think…I think I'd prefer to refrain from exploring that memory for now. It's…rather traumatic to say the least.

Rimuru's line of thought was cut off as suddenly, she heard yelling nearby. "Huuh?" Milim remarked as she looked in the direction of the yelling alongside Rimuru. They could see two people nearby. One of them had light skin, incredibly spikey ash-blond hair, and sharp red eyes. He was glaring at another student in front of him.

The student he was staring at was rather plain-looking, with light skin, rounded dark-green eyes and messy dark-green hair. He seemed rather timid and weak, with his arms up in a confused, defensive posture as he turned and faced the other student. "Get out of my way or you're dead." The ash-blond haired student said. "M-morning, let's both do our best…" The plain-looking timid student attempted to respond, as the aggressive student simply walked past him.

"Huh…I think I've seen that kinda aggressive-looking guy before." Milim remarked as she squinted her eyes. You have? Well, he does kind of look familiar…where could I have seen him before? Rimuru thought.

"Hey…isn't that Bakugo? From the Sludge Incident…?" One student remarked as they looked towards the boy with the ash-blond hair. "Sure is…" Another student responded.

Ah.

Both Rimuru and Milim instantly recognised the ash-blond haired boy named Bakugo.

That's right. Some time ago there was an incident where a boy got attacked by some kind of sludge-like villain. It was reported about on the TV. Quite embarrassing to say the least, he haad to be rescued by the Number One hero, All Might.

All Might…he's always intrigued me. He's potentially the most powerful person in the world, and yet he is the Symbol of Peace, the embodiment of justice. You'd think that with that kind of power, it would get to his head. But it hasn't. I guess there are people out there who just don't get arrogant no matter what.

Well, Milim would be a very good example.

"Wonder who the other guy is though…he looks kinda weak." Milim remarked as she looked towards the boy with the dark-greenish hair who Bakugo had just been yelling at. He seemed to be shaking and rather afraid, from what they could tell. "Wonder if he'll make it…" Rimuru remarked.

And then the boy with the dark-greenish hair attempted to take a step forwards but completely missed, tripping over.

Nope, he won't. Both Rimuru and Milim thought.

The boy's fall was stopped by a nearby girl, who suddenly levitated him and prevented him from hitting the ground. "Interesting quirk." Rimuru remarked. "Ah, whatever, let's head inside! I'm tired of waiting, I wanna have fun already!" Milim remarked. Rimuru chuckled in response.

Always an impatient child.

"WELCOME TO TODAY'S LIVE PERFORMANCE! EVERYBODY SAY 'HEY'!"

The teacher put his hand to his ear as he expected a response, but only heard an awkward silence. They were all now in a large hall, with hundreds of students sitting down and listening. Rimuru and Milim were sitting next to eachother, watching and listening.

"WELL THAT'S COOL MY EXAMINEE LISTENERS, I'M HERE TO PRESENT THE GUIDELINES OF YOUR PRACTICAL! ARE YOU READY?! YEAH!" The teacher exclaimed, conveniently ignoring the fact that nobody had responded to him earlier.

That's the Voice Hero, Present Mic, right? I've heard of his Radio Show, but I didn't really expect to see him as a teacher here. Rimuru thought. Milim was sitting there silently, listening intently with a cheerful smile on her face. Rimuru thought she could hear continuous mumbling nearby from one of the other students, but ignored it.

"This is how the test will go, my listeners! You'll be experiencing ten-minute long 'mock cityscape manoeuvres'! Bring along whatever you want! After this presentation, you'll each head to your assigned testing location!" Present Mic exclaimed. The screen behind him lit up and showed a diagram with a large box tagged 'CURRENT LOCATION', with various lines connecting it to smaller boxes tagged A, B, C, D, E, F, and G.

"OKAY?!"

There was only more silence.

"Each site is filled with three kinds of faux villains! Points are awarded for defeating each according to their respective difficulty levels! Use your Quirks to disable these faux villains, and earn points! That's your goal, listeners!" Present Mic explained. "Of course, playing the antihero and attacking other examinees is prohibited!"

"May I ask a question?" Suddenly called out a voice from the crowd of students. Rimuru glanced over towards the source of the voice, and saw a student with light skin, short black hair and smart-looking glasses. He pointed towards one of the handout sheets, holding it up.

"There appear to be no fewer than four varieties of the faux villains, according to this handout! Such a blatant error, if it is one, is highly unbecoming for U.A., Japan's top academy! We're all here today in the hopes of being molded into model heroes!" The student exclaimed. He then turned around and pointed towards another student.

"And, you, with the curly hair! You've been muttering this whole time…it's distracting! If this is some sort of game to you, then please leave immediately!" The student added. Rimuru glanced over to who he was pointing at, and saw that it was the same dark-green haired boy from earlier. "Sorry…" The boy responded.

Geez, how unlucky can that guy get. Rimuru thought.

"Alright, alright. Examinee 7111, nice catch. Thanks!" Present Mic responded as the student turned towards him. "But the fourth faux villain variety gives you zero points! He's more of an obstacle! There's only one at each site, a 'gimmick' that'll rampage around in close quarters!" He explained. "Got it…so it's like a stage gimmick to be avoided." One student remarked.

"Thank you, sir. I apologise for the interruption!" The student with the glasses exclaimed, before sitting back down. "Well, that's all from me!" Present Mic exclaimed. "I'll leave my listeners with our school motto."

"The great hero Napoleon Bonaparte once said…'true heroism consists in being superior to the ills of life'."

"PLUS ULTRA!"

"Break a leg, everyone!"

Rimuru stared in awe at the sight in front of her. She had gone to the test site she had been assigned to, and had found herself standing outside what seemed to be a miniature city. Buildings, streets, so on and so forth. The dozens of other students who had come to this test site were also in awe.

"It's like a whole city…must be rather expensive to make and then repair…" Rimuru remarked. She looked down towards her hands. Milim had been assigned to a different test site, so they were separated. And this was the first time Rimuru was going to fight in her Human form. Would she be alright?

I'll be fine. Rimuru thought.

"Excited? I know I am." Said a nearby voice. Rimuru turned, and saw a girl standing next to her. The girl's skin was tinted pink, with her eyes possessing black sclera and yellow irises. She had short, messy pink hair with yellow horns protruding from her head. "Yeah…I guess you could say that." Rimuru responded.

"I'm Mina Ashido. What's your name?" The pink-skinned girl asked as she held her hand out cheerfully. Rimuru shook Mina's hand. "I'm Rimuru, Rimuru Tempest." She answered as she let go of Mina's hand.

"Ooh, I love your hair! It's so colourful and cute! Is it natural?" Mina asked. Rimuru nervously chuckled as she scratched the back of her head. "Yeah, it is...your hair's quite interesting as well." Rimuru responded. Mina motioned towards her hair.

"This? Yeah, I like to think so. It's pink like my skin as well, I think it matches!" Mina responded cheerfully. She lowered her hand as she looked towards Rimuru. "So what Quirk do you have? A strength-enhancing one? Elemental?" Mina asked. Rimuru glanced down at her hands.

"It's kind of complicated…" Rimuru responded. "Okay, well I'm sure I'll see it during the test, after all! My Quirk's 'Acid', I can shoot corrosive liquid from my body!" Mina exclaimed, a cheerful smile on her face. Reminds me of Milim, just a bit. Rimuru thought.

"AND…BEGIN!"

Rimuru's eyes widened, as did everyone else's. "Hmm?" She remarked. Present Mic's voice had just been heard all throughout the area. "WHAT'S WRONG? THE TEST'S STARTED! RUN! RUN! THE DIE IS CAST!" Present Mic's voice exclaimed once again.

And everyone including Rimuru and Mina turned, sprinting right into the test site immediately. Jesus, that was abrupt. I can't lose time, time is precious here.Rimuru thought as she ran. The students started to split up all throughout the city, and Rimuru noticed that Mina was already gone. Well, it's not like staying together would increase our chances of succeeding, since this was a point-based test. Rimuru thought.

As Rimuru split from the other scattering students and ran down one empty street, she heard a rumble as suddenly, a Villain Bot smashed through a nearby building and out onto the street in front of her. The Villain Bot was a One-Pointer, with a long, snake-like neck, two arms with Gatling-Guns and a large single wheel used for moving.

"Target locked! Prepare for extermination!" The One-Pointer exclaimed as its single eye glared towards Rimuru. One-Pointers with quick, but fragile. It raised its right arm, moving forwards fast as it swung its right arm down towards Rimuru. Before the attack could connect, Rimuru took a deep breath in and clenched her left hand.

「Body Armour」

Suddenly, silver metal scale-like armour formed around Rimuru's left arm up to her elbow, as she raised her left arm and blocked the swing. Stepping forwards, she thrust her left arm forwards and drove her armoured fist into the One-Pointer's chest, smashing it completely and launching it into the ground. Several other Villain Bots swarmed into the area, as Rimuru turned and attacked them.

My Quirk. Those abilities I mentioned earlier were not the powers of my Quirk. My 360-degree vision, my regeneration, lack of pain or to eat, drink or sleep, it's all the natural attributes of my new body. Not my true ability.

My true Quirk is known as 「Devouring Goo」. I expand my body into its true, slime-like form and absorb the target into my body, gaining the ability to either store or devour them. Storing them doesn't harm the target, instead capturing them within my body. Very useful if I wish to trap an opponent. But if I devour the target…I permanently gain the ability to mimic their appearance and abilities.

Including their Quirk, if they are Human.

I am a Quirk stealer. Probably one of the rarest powers in history. I've taken powers from animals before, such as a spider's web and silk, or a bat's ultrasound waves, though they are significantly weaker than Quirks. But I have only devoured a Human and taken their Quirk once. 「Body Armour」is that Quirk. And the person…

Let's just say it's a memory I'd rather keep buried.

However, I have limits. If my target is conscious, they can resist my absorption and potentially prevent it from succeeding if they are strong enough. My devouring cannot work on nonorganic machines, and my storage has a limit. Still, it's all very useful.

Storage can actually be used offensively, did you know? I'm able to forcefully expel anything from storage if I wish to. Let's say, if I stored a large amount of water, and expelled it in a specific form…

"Water Blade!"

Rimuru jumped all around the area, swinging her arm as she released a blade of water from the storage of her body. The blade of water fired through the air like a bullet, slicing into three Villain Bots and slicing them all in half instantly. 32 points. Rimuru thought.

Water Blade is not a Quirk. It is a technique. By expelling water forcefully from the storage of my body within the form of a blade, I can fire it like a projectile and slice through even solid rock or steel.

Or, alternatively…

"Hydraulic Propulsion!"

Rimuru expelled a massive continuous blast of water from her back, propelling herself through the air as she drove her armoured left fist into the core of a Two-Pointer before firing a Water Blade through a One-Pointer. 35 points. She thought. Rimuru continued fighting, slicing and blasting her way through the Villain Bots, moving from one area to another as she even assisted other students occasionally.

"Such a wide battlefield and limited time...brings out the best in them."

The overseers watched the events of the practical entrance exam through their monitors. "Intelligence gatherers: there are those who can assess the situation in an instant. Mobility experts: those who'll never be late to the party. Decision makers: those who can cope in any given situation. And then there are the natural-born warriors…"

"The abilities needed to preserve peace in our cities…are judged by the points they earn."

"This year's quite the bumper crop, huh?" One of them said.

"Nah. No way to know yet." Another responded. "But this should tell us more…" They began, moving and pressing a button.

"It begins now!"

Rimuru's eyes widened as she heard a massive rumble nearby. The other students in the area stopped as well as they looked up towards its source.

A massive Villain Bot, around the size of a large building, smashed its two hands onto two nearby buildings. It was several times larger than the other Villain Bots, to the point that the other bots could only be considered 'fodder' compared to this one.

Whoa…that one is massive. It must be the 'gimmick' that rampages around in close quarters, the Zero-Pointer we're supposed to avoid. I couldn't even hope to defeat it as I am now…none of my abilities could probably even harm it. It'd be a walk in the park for Milim, but I think I'll have to stay out of that one's way…

Rimuru quickly rolled into a nearby building, avoiding the Zero-Pointer's massive hand as it smashed down onto the ground. The other students turned and ran, and Rimuru could see Mina among them. Guess even acid can't take care of that thing, huh? Rimuru thought. Using her 360-degree vision, Rimuru quickly dodged to the side as the Zero-Pointer's hand came smashing into the building she was in. As the building started to crumble around her, Rimuru propelled herself with water once again out into the air as she landed on top of a nearby roof, a far distance from the Zero-Pointer.

Rimuru sighed as she turned to watch the Zero-Pointer smash around randomly towards the surrounding students. Quite a show. I wish I'd brought popcorn. Rimuru thought. Suddenly, just as she was thinking, Present Mic's voice boomed through the surrounding area.

"IT'S ALL OVER!"

And the Villain Bots, including the Zero-Pointer, stopped.

The test was complete.

Welcome to 'My Slime Academia', a new fanfiction series I am writing as a crossover between Tensei Shitara Slime Datta Ken and My Hero Academia. I'm a big fan of both series and I thought it would be very interesting if characters from the Tensei Slime universe were in the My Hero Academia universe instead. I also find it rather funny how nobody else has written a Tensei Slime/Hero Academia fanfiction on this website until I did now.

I'm going to be taking a unique approach with this fanfiction. I'm not just going to be copying and pasting characters from Tensei Slime and dropping them into the My Hero Academia universe. While characters like Rimuru will be the same, I might also do a complete re-imagining of other Tensei Slime characters in this fanfiction to suit the narrative, maybe with completely different abilities as well. I like creativity, and this fanfiction is for entertainment, so I hope my creativity will entertain you all.

The story will of course mainly be from the viewpoint of Rimuru as she joins Class 1-A in U.A. High School. The narrative will be following the same timeline of the official My Hero series, so we'll see many heroes, villains and situations we are familiar with. However, in parts of the story where the class is separated, I will take the initiative to write something completely original.

This will not be a copy and paste of the official My Hero series. I will be changing scenarios when necessary, to fit the narrative, though it will still be closely connected and I won't try to go overboard with changes.

Deku, Bakugo, All Might, all of them will appear just as you remember them, and the villains you know will appear as well. I'm just going to make things more interesting with Tensei Slime-based characters, new scenarios or plotlines, or maybe some completely original stuff.

I'll also bring in some original characters I've written myself, to spice things up. And some characters who weren't really focused on in the official series, I'll give a bit of a spotlight here as well.

Also, with Rimuru, you may have noticed that I'm referring to her as female. Since the whole 'reincarnation' plotline isn't really relevant to this fanfiction, and I don't want to overcomplicate things, Rimuru will be considered female in this series from the start, mainly due to the fact that her Human form is female in appearance.

The whole 'mentally male, physically genderless but with a feminine appearance' thing will just overcomplicate the situation. If you disagree with this decision, then please leave or just deal with it, this is fan entertainment that is not meant to be 100% the same as either series. This is just for fun. Please respect that.

Also, of course there is heavy spoilers for My Hero Academia, and potential indirect spoilers for Tensei Slime since I will take elements from that series as well. Please don't complain.

All that said, I hope you enjoy.