Our secret

Katsuki and Himiko are what you call fake twins. Apart for their gender, their also quite different physically. While Katsuki possess bristly blond hair and red eyes similar to the color of the blood, his sister got straight blond hair with yellow cat like eyes. Himiko also have a pair of sharp fangs similar to a vampire. 

Katsuki is a short tempered, hot blooded and full mouthed man who take pride in his quirk but he's not a bully. He's kinda protective of Himiko even tho he always say the contrary. Why ? Because during their childhood and early teens, others tended to bully Himiko because they thought that her quirk was strange. So Katsuki has to teach them a lesson. He also fought against the bullies of his childhood friend, Izuku Midoriya, a quirkless green haired boy the same age of the twins. The three of them have known each other since their birth because of their mothers friendship. 

Himiko, on the contrary of her brother used to be shy and ashamed  of her powers because of the others but it changed when she entered middle school. Here she met a brown haired girl with pink cheeks named Ochako Uraraka and they both helped each other to be more confident. Not long after, Ochako was included in the trio and they becomed an inseparable quatuor
Now, Himiko is a bit of a lunatic and she joke a lot, playing pranks using her quirk. She also loves to tease other about blood related jokes that some people find kind of scary. 

Our four friends all wanted to go to Yuei but for different reasons. Katsuki wanted to go because of his strong quirk and because he want to be the number one hero, Ochako wants to help her parents financially, Himiko wants to prove that even with her quirk she can be a hero and lastly for Izuku it's because he admire All Might and wants to be a hero even if he's without powers.
Just before the end of their last year of middle school, an incident happened with a villain who captured Katsuki and while Izuku tried to save him he catched the attention of All Might who chose him to be his successor.
Izuku wasn't able to hide it from his friends for long, largely because of the twins muscled questioning. No need to say that Katsuki was a little jealous but everyone was happy for their Deku. 

The group tried the entrance exam for the hero school and of course they all aced it, ending up in class 1-A supervised by the professor and pro hero Shota Aizawa AKA Eraser Head who's dream is to be a magnifique papillon (french ref sorry). 
The time passed after the debut of their school year and two months ago Deku and Ochako anounced that they started dating each other to their friends who congratuled them even tho some of them were a little lost because they believed none of them were straight but heh no one can be right every time.

So now, we're a friday evening and the girls decided to do a sleepover at Momo's room because it's the biggest. So now, Tsuyu and Mina are in charge of inviting the rest of the girls. They are now in front of one of their last stop, Ochako's room. Like they usually do, they barge in the room without knocking, a fatal error. In front of their shocked eyes lay a scene they would prefered to never see. In front of them, Ochako is not alone. Ochako is sitting on the edge of her bed with Himiko on her lap, both of them are topless and they are engaged in a furious and passionate make-out session. Well it's more like they were because of a "WHAT THE FUCK !?" shooted by Mina stoped the two girls who now looks like deers caught in a headlight.

While in a hurry to try to explain the situation, Ochako stand up, making Himiko fall on the ground with a grunt. While Tsuyu is still choked by the situation she just whitnessed, Mina is now in full angermode, shooting at Ochako. "Ochako you cheater ! How could you do that to the poor Deku ? With Himiko nonetheless !" Her yelling started to attract other people and soon, all the members of their class was present to see the scene. Fortunately, the two girls had time to put on shirt before the whole gatering. 

While Mina was yelling at Ochako how she found her hatitude disgusting and that Tsuyu was trying to calm her, Himiko grab her phone and write a text to her brother saying Come here asap with your nerd, Mina caught us and she's slandering Ochako. We need to explain everything. 

In less than five minutes, an angry voice was heard behind the other students "GET OUT OF MY WAY EXTRAS OR I BLOW YOU TO THE WALL !" No need to say the student parted like the sea with Moise. Katsuki make his way with Izuku in his shadow until they made it into Ochako's room. 
Then, the green haired boy, detached himself off the blonde boy and walked in front of the human version of Kirby, shielding her from Mina's words while Katsuki joined his sister who was at the opposite of the room. 

The fact that Deku seems to protect Ochako  rendered Mina flabbergasted. When she regain her composure, she started to question him. "Why are you protecting her, she cheated on you ! I saw it with my own eyes ! I can't believe she was able to do that to you-" she was cut by Izuku "I know", the young man looked at the twins who immediately moved from their place to the couple side. Himiko took Ochako's hand in hers and Katsuki crossed his arms and glared at the other students. "Ochako and I weren't honest with everyone. To be honest we never dated, we fabricated this fake relationship because we weren't ready to tell about our real relationship." After saying this, Izuku grabbed Katsuki collar and kissed him. You were clearly able to see the chock on the majority of the audience except for the ones who got a gaydar. People like Yuga Aoyama who shouted a "I knew it ! I knew it they weren't straight ! J'étais pas fou !"

"Aoyama is right, Deku and I aren't straight. I'm a lesbian and i'm with Himiko. We started dating a year ago" "and I'm with kacchan since we're 15. We're sorry to have lied to everyone but we weren't ready to tell you and you were kinda pressuring us with your questions about our love life."
The two couples bow their head to show they're sorry but their classmates  stop them "you don't have to say sorry, it's our fault for pressuring you. And...Sorry Ochako for what I said earlier to you...I didn't knew the situation and i didn't let you explain yourself" say Mina apologically. 

The brown haired girl smile at the pink girl "Don't worry Mina, you didn't knew and it's the proof that you're a good friend if you got this angry on the behalf of Deku"
At this time, the people who were here only for the drama, left and only their real friends were still here. Ochako's room was too cramped for everyone so they moved to Momo's room wheere the sleepover would have normally take place and they talked and played all the night like the drama didn't occur but this time, Ochako and Himiko and Izuku and Katsuki were not hiding themselves nor their PDA. 
Turns out that Katsuki is protective of Deku, always having him on his lap with his arms locked around the waist of the latter and his head on his shoulder. The girls were more tamed, sitting next to each other but always having their hands locked together and exchanging kisses some times. 

After that, everyone in the high school learnt of the relationships and accepted it and our protagonists worked the courage to do their coming out to their parents. But their parents laughed and said they already knew with how their children acted around their partner. In the end, everything ended with laughter and smiles from everyone and less weight on their shoulders now that they didn't need to hide their real selves and feelings. 

THE END  

Hello Everyone, thanks for reading this a,d sorry if it's not really understandable. Like I said in the summary, English is not my native language so I may and probably made a lot of error but my brain didn't wanted me to write it in french.So thanks for reading it even with errors and special thanks for my friend @Licorne-Chieuse who made the cover !