The Harry Potter crossover nobody really asked for! A short summary: Otabek teached Yuri how to cast a Patronus charm.

The last day of Otayuri week! D: I can't believe I actually managed to write a drabble for all seven days~ The first idea that popped up in my head when I thought of a fantasy prompt was a Harry Potter AU (probably because I reread the books not so long ago), but then I also considered a Mulan AU, and also a Kuzco AU but I ended up with HP anyway ^^

I'll leave the houses up to you haha xD I'm a big fan of Gryffindor!Otabek and Slytherin!Yuri, but those options are up for discussion since I don't mention their houses anywhere.

"Hey, can you give me my copy of History of Magic?" Yuri put out a hand.

Otabek didn't answer, but the book came flying right into Yuri's hand. Yuri noticed. "Oh please, stop bragging you're allowed to use magic outside of school. If the Ministry thinks I did it, I'll be in huge trouble!"

"You shouldn't worry so much, no one will come to punish you." Otabek said calmly.

"That's easy for you to say, you're already 18."

"And if they sue you, I'll go to the Ministry, explain what happened and show my wand."

"Fine," Yuri sighed in defeat, "use magic like the superior being you are."

"Just older." Otabek waved the supposed compliment away.

Yuri looked up from his book. "How are you doing on your Patronus?"

"I cast it actually."

Yuri's eyes widened. "Oh really? What animal did you get?"

"Do you want to see for yourself? I can recreate it." Otabek suggested.

"Yes, please," Yuri almost begged him.

Otabek smiled. "Sure, give me a moment then." He closed his eyes, brows furrowed in concentration. When he was focusing on a happy memory, he raised his hornbeam wand and said expecto patronum.

Nothing happened for a second, but then a silver mist appeared from Otabek's wand. It took form and immediately, Yuri clapped his hands together in joy.

"What a beauty!" Yuri crouched down to take a better look at the Patronus.

The Patronus on the other hand, walked away without even noticing Yuri, only to jump on Yuri's desk to finally settle itself on Otabek's shoulder.

"Can I touch him? What breed is he?"

"You can't touch him," Otabek said as Yuri's fingers went through silver fur, "and he's a Siberian."

The cat, with wild, long fur and a proud look in its eyes, looked down on Yuri.

Yuri laughed nervously. "He has your eyes, Beka."

The Patronus took its eyes off Yuri and rubbed its head against Otabek's, who laughed.

"Can you touch him?" Yuri asked in wonder.

"He's my Patronus, of course I can touch him." Otabek shrugged with his free shoulder.

"Can you teach me," Yuri asked, "the Patronus charm, I mean. I want to know the form it takes. I hope it is a tiger."

Otabek laughed. "You only want to know how to cast it because of that?"

"It's a tricky spell, isn't it?" Yuri pouted. "Besides, it's not like we're ever going to need it."

"I guess you're right." Otabek said, letting his Patronus disappear. "When do you want to begin?"

"How about after Christmas break?" Yuri suggested. "We're going back in a few days anyway."

"What will I get in return?"

Yuri grinned. "You'll get to spend extra time with me, what's more to wish for?"

Otabek sighed. "I knew you were going to say that. Use those last few days to think of something, or I won't teach you. "

"That's fair."

"What do I need to do first?" Yuri stood in the middle of the Room of Requirement, with Otabek facing him.

"Close your eyes."

"Are we playing that game?" Yuri smirked.

Otabek sighed. "Yes, the moment you've closed your eyes, I'll leave you alone."

Yuri had almost closed his eyes, but opened his eyes straight away. "You promised me."

"Close your eyes, Yura." Otabek laughed.

Yuri begrudgingly closed his eyes. "What do I do now?"

"I want you to think about a happy memory."

"Which one?"

"Pick one."

"Then I'll use the one where we –"

"You don't have to tell me which one you're using," Otabek interrupted him, saving Yuri some awkwardness.

Yuri blushed. "I have a memory."

"Concentrate on it, concentrate on it hard."

"And then?"

Otabek smiled, invisible to Yuri. "Cast the spell."

Yuri cracked one eye open. "Really? It's that simple?"

"If it really were that simple, don't you think the spell would be in our curriculum? Now close your eyes and concentrate."

"Yes, Professor." Yuri smiled. He then stood silent for two seconds before pointing his wand at Otabek. "Expecto patronum."

Nothing happened.

Yuri opened his eyes, expecting to see immediate result, but when there was nothing but air between him and Otabek, he let his hand fall at his side.

Instead of consoling Yuri for failing at his first try, Otabek did something else. He stepped in closer and forced Yuri to look upwards to him by putting his hand on Yuri's jaw. "What memory did you use?" His tone wasn't unkind.

"Do you remember that one time a Niffler escaped and you helped me look for it? I used that one." What Yuri didn't mention was the earring stolen from Yuri, or the kiss they had shared behind the broom shed.

"I quite like that memory, if I'm honest," Otabek admitted with a smile. "You want to know which happy memory I used?"

Yuri nodded as best as he could with Otabek still holding his jaw.

Otabek whispered it into Yuri's ear.

"Really?" Yuri looked at him with unbelieving eyes. "Of all things you could pick, you chose that one?"

"I did and it worked, so you can't criticize me for it. Now try again with a different memory."

Yuri pulled a face. "Alright, but I sure as hell won't be using yours."

Victor Nikiforov, current Defense Against the Dark Arts professor, stood in front of his students. "I bet you've all heard of the Patronus charm at least once in your lives, but is there someone of you who can cast a successful corporeal Patronus?" From the look on his face, it was obvious he didn't expect much from the fifth years.

A smug grin already on his face, Yuri raised his hand. "Actually, Professor…"

Victor clapped his hands. "Yurio! Could you please demonstrate it in front of the class then?"

As Yuri stood, his classmates looked at him as if he was the new Harry Potter. Keeping his air of confidence, he stood next to Victor and closed his eyes, focusing on his happiest of memories. *include memory? But which memory?*

"Expecto patronum," Yuri cast the spell and much like the calmness Yuri emitted was the look of the Siberian cat that jumped on Victor's desk and looked down on everyone else like he ruled them all.

Victor patted Yuri's shoulder, only to barely avoid a silver claw by instinct. "Otabek must be proud of you."

"How did you know it was him who taught me?"

"Oh don't underestimate me now, Yurio, I can put two and two together." Victor winked.

It was only after his Patronus disappeared with a swish of his wand and he had sat down that Yuri realized Victor must have also seen Otabek's Patronus. Naturally, Yuri already started planning on how to never have to cast a Patronus charm ever again and also on how he was going to return the favor to Otabek.

Did I pick a good Patronus for the both of them? I, myself, really like Siberian cats, and I can imagine Otabek (unconsciously) taking Yuri's corporeal form. Victor has a peacock as a Patronus and Yuuri has a seal :D

So anyway, thank you for staying with me this past week, I had lots of fun, I hope you've enjoyed my drabbles too and maybe I'll see you guys next time:3