Hi this is my 1st supercorp fic, I do not own any right of Supergirl or the DC universe, this is just for fun and, because some of my followers ask me to do a supercorp work. Hope you enjoy it too. The beginning of this story will be during season 4, and, the last scene will be like season 2 episode 4. Everything in bold italics will be the thoughts of the characters, what is in their mind. Let me know what you think about this, thank you in advance if you have the time to leave a review. Have a great day!

(At Catco)

Nia. - "Kara, do you have a moment?"

Kara nods. - "Yeah, sure…"

Both girls go to the terrace and, once they are alone, Nia reveals something…

Nia. - "I know you are Supergirl… "

Kara. - "What?!"

Knowing Kara's secret is not the only revelation of Nia…

Nia. - "I know you are Supergirl because I… I can see the future…"

Kara. - "What ?!"

It looks like Kara can't formulate a complete sentence and, this doesn't make it easier for Nia, but, there is no time to waste so, Nia continues talking…

Nia. - "I don't know if it's a gift or a curse, but, I have seen the future, that's why I know you are Supergirl. Before coming here, I knew, I know that one day, you would be my mentor, and I'm not talking just about being a reporter…"

Kara. - "What do you mean?"

Nia. - "You will help me to use my power to help people and, with your help, I will become: 'Dreamer'... "

Kara looks very confused with everything that she's hearing and, she gets more conflicted when Nia warns her about the end of the world. Kara shakes her, she does not want to believe that the world… Her world will end, very, very soon…

Kara. - "I know that everything looks very bad, and, you might be scared but…"

Nia. - "Kara ! I'm serious! This hate will rise in a scale you can't imagine, it will poison the heart of more than a half of the world and, it will destroy us…" (deep breath) "A very advanced technology will be in the wrong hands, and that will be the end of the world as we know it…"

Kara shakes her head, she refuses to believe it…

Nia. - "You don't believe me…" (she approaches and, putting her hands around Kara's face, she says) "Let me show you…"

*** Kara's narrative (voice-over) ***

We do our very best, but it's never good enough… being good is not enough, no matter how hard I try to protect others, it doesn't make a damn bit of difference, because when bad things come, they come out of the last place you ever thought…

Lena was working late in her office when someone lands on her balcony. The brunette doesn't bother on looking at the girl of steel, she is still angry with the hero…

Lena. - "Just because I helped to keep you alive and, clear the atmosphere from kriptonite, it doesn't mean you can come to my office whenever you want. We are not friends…" (she raises her head and, says) "You're not welcome in my office, you… "(she frowns) "You are crying…"

Lena wanted to act cold and distant with our dear hero, but, how, how can she act cold and distant when the hero looks like that... so broken, so sad...

Supergirl cries. - "Why?! Why Lena…?!"

Lena. - "What are you accusing me now?!"

Supergirl. - "You are experimenting with the material of my planet, after Reign you kept working with those elements we used to vanquish her… Why?!"

Lena avoids eye-contact and, replies. - "I don't know what you're talking about…"

Supergirl. - "Don't lie to me!"

Lena. - "You can't ask me to be honest with you when you say just lies to me!"

Spuergirl. - "I don't know what you're talking about..."

Lena says with a bitter voice. - "Really...?! I'm the smartest woman in the world, do you really believe that I wouldn't notice that Kara Danvers & Supergirl are the same person?"

Supergirl drops her jaw open, she can't believe that Lena has known her secret identity for a long time...

Lena says with pain in her voice. - "I hoped that one day you would tell me, but, I guess that will never happen..." (Sad chuckle and tears) "How stupid I was to believe that a super & a Luthor could be something else than enemies..."

Kara stays in silence, she's constantly lying to her and, till this moment, she realizes the impact of her actions…

Kara mumbles. - "They stole your research…"

Lena. - "What ?! That is impossible…" (she looks at her laptop and, at the video cameras of her secret lab and, says) "That is…" (she gasps in shock when she realizes that the lab is empty) "No… Who…?!"

Supergirl. - "Mercy…"

Lena. - "I was so distracted in the DEO, working with brainy, trying to clean the atmosphere. GOD! She knew I would be distracted…" (she types on her laptop and says) "I can track them down, I…"

Kara says with a defeated voice. - "It's too late, there's nothing to do…"

Lena. - "What do you mean?!"

The CEO gets angry with the defeated attitude of the hero…

Lena. - "You are supposed to be our ray of sun! You're supposed to always bring us hope! How can you say that?!"

Both girls look at each other, they look into their eyes, into their hearts and, for the 1st time, both realize how deeply their feelings are for each other...

Kara says with a wrenching voice and, tears rolling over her cheeks. - "I saw the future. You've no idea how it feels to see the planet you love being destroyed... it was like losing Kripton all over again, but, this time, hurting me thousand times more... and, do you know why?"

Lena gulps

Kara sadly says. - "Because, I might be an alien, but, this is my home, all the people in this world, my family: Alex, Eliza, Clark... all the people I care about are going to die and, I can't stop it... and, the worse part, the part that literally breaks my heart is you..." (sad chuckle) "I didn't see that coming... for someone who has X-ray vision, I realize that I've been very blind..."

Lena frowns. - "What do you mean...?"

There's a moment of silence, the blonde breathing deeply, not sure if she should reveal what she just realized, but, there's no time... no time to waste...

Kara. - "Seeing you dying, it has been the worst part of all..."

Lena swallows hard...

Kara cries. - "You meant so much to me, I didn't know till now, till..."

Lena mumbles. - "Till is too late to do something about it..."

They look in their eyes with an intense gaze. Looking at those emerald green eyes, Kara confirms that she cares deeply for Lena, so deeply that she refuses to let her die...

Kara closes her fists and, says. - "NO!"

Lena frowns. - "No, what?"

Kara prepares to leave and, says. - "No, you'll not die! I will not let you die!"

Lena. - "But, you said that there was nothing to do?"

The hero is floating now, Lena put her hands over the rail-hand of her balcony and, looking at the hero, she wildly opens her eyes when she hears...

Kara. - "I can't lose my world... I can't lose you..."

Lena mumbles while she sees the blonde hero, flying away. - "Kara..."

*** Kara's narrative (voice-over) ***

Life is about trusting your feelings and taking chances. Finding happiness is not easy and, realizing everything you ever wanted has been always in front of your eyes, it really changes your world... your future... and, in my case, even, my past...

(In Flash's universe)

Flash. - "This is wrong, Kara, please, don't do it..."

Kara. - "You have done it before..."

Flash. - "Yeah, but..."

Kara. - "No buts. I can't lose my world, Barry..." (She says with tears) "I can't lose Lena..."

Flash sighs. - "Kara..."

Kara. - "It took me so long to realize that she gives me the kind of feelings people write novels about... and, I will do whatever I need to don't lose that..."

Flash. - "You shouldn't alter the past, the present and, the future..."

Kara. - "I just need to change one thing... just one thing..."

Flash sighs deeply, he knows that no matter what he says, there's no way to change Kara's mind about doing this...

Kara. - "So, can you help me...?"

Flash takes a deep breath, he nods...

Kara smiles. - "Thank you..."

Flash gets ready to run and, says. - "Are you ready? Do you know where do you need to go?"

Kara gets ready to run at his side and, says. - "I know exactly at what moment I need to go back and, what I need to do..."

*** Kara's narrative (voice-over) ***

If you had the power to undo, change one thing in your life, what would it be?

Lena was in her office at night, she was writing something when the doors of her office wildly open, she looks up and, a tiny smile appears on her lips when she sees the blonde woman who's walking in without being announced while Lena's assistants is walking after the blonde, saying...

Assistant. - "Excuse me, you can't go in there!" (She looks at her boss Lena and, says) "I swear that I just blinked and, she got right past me..."

Kara. - "Lena, I'm sorry, this is my fault... everything has been my fault, but, I'll make it right..."

Lena stands up, she frowns, she has no idea of what Kara means...

Assistant. - "She's so fast..."

Kara. - "I just need to talk to you..."

Lena nods, she gives the instructions to her assistant that Kara can be shown in right away all the time. Kara smiles when she hears that. The assistant leaves them alone and, Lena sits on her desk and, says...

Lena. - "So, how I can help..."

Kara waves her hands and, plays with her glasses, she knows what she came to do, she's just not feeling ready for it...

Lena raises an eyebrow. - "Miss. Danvers...?"

Kara. - "Kara... don't you remember you told me to call you Lena...?"

Lena chuckles and, nods. - "Right... Kara... do you wanna sit and, tell me why you are at my office at this hour?"

Kara says with a nervous voice. - "I prefer to stay up, if that's ok with you..."

Lena. - "Ok..." (She sees the girl very nervous and, says) "Something wrong?"

The blonde starts a stemming speech, the brunette CEO is amused with the non-stop and non-sense of Kara's speech, but, she needs to stop this or, she's sure that the blonde needed to stop to breath...

Lena. - "Kara, please, breath..."

Kara chuckles. - "Oh... yeah... I was talking and, I forgot to breath too..."

Lena chuckles and, Kara smiles, hearing Lena's chuckles, it makes her so damn happy...

Kara smiles. - "I love that..."

Lena. - "What?"

Kara. - "Your chuckles..." (She smiles with blush on her cheeks) "Your laugh, your eyes, your accent when you talk, the way you dress, so elegant..."

The blonde continues saying a big list of all the things she loves from Lena and, the brunette stays speechless, blushing a lot...

Lena. - "How do you know so much about me? How do...?"

Kara walks around the desk, standing beside the CEO of L-corp, she grabs Lena from the arm and, forces her to stand up. She's stronger of what I thought, Lena thinks, and she's very confused by all that is happening till...

Kara. - "I can't explain you why I know so much about you. All I can tell you is that you, Lena Luthor, you need to know me, really know me..."

Lena frowns. - "What do you mean...?"

Kara. - "Do you have your alien detector around here?"

Lena nods. - "Yeah, I noticed that it was broken, I repair it, but, I need to test it again..."

Kara. - "Test it with me..."

Lena frowns. - "What...?"

Kara pleads and, Lena was confused because the other day, Kara already tried the detector, she even wrote an article about it. So, why the blonde reporter wanted to try it again? The brunette has no idea. Lena extends her arm towards the blonde, with the detector in her hand; feeling insecure, Kara approaches her index finger to it, she stops a moment and, looking at Lena in the eyes, she says...

Kara. - "I've 3 things to confess..."

Lena frowns and, she gets more confused when Kara puts her finger in the detector and, the light appears red (red = alien).

Lena. - "What...?"

Kara mumbles. - "One: I'm an alien..."

Lena. - "Wh...?"

The brunette was in shock and, she gets more speechless when the blonde opens her blouse, revealing the symbol 'S'...

Kara. - "2: I'm Supergirl..."

Lena says in shock. - "Why you're revealing me this...?"

Kara mumbles with a shy smile. - "Because... 3: You, Lena Luthor... you're my world..."

Lena. - "What?! What do you mean? Wh...?"

Kara cuts her off with a kiss on the lips and, the CEO's eyes get bigger of shock because she can't make sense of what is happening...

*** Kara's narrative (voice-over) ***

If you had the power to undo, change one thing in your life, what would it be? I can't ensure that it will be better, I can't ensure I will not make it worse... but, I can ensure that this time, I'll be honest with the person who means the world to me, completely honest...