(Y/N) (L/N) was the twin sister of Ali (L/N), the popular, sporty cheerleader at their middle school. Most people got them confused because they were identical, but most of the time, (Y/N) was invisible. The quirk they share is called Flammable Breath, but (Y/N) got the stronger, better side of it with little side effects, while Ali got the weaker side.
When Ali gets admitted to the hospital after an incident with a villain, she decides she wants to become a hero and go to Yuuei academy, she asks (Y/N) to go to entrance exams for her, knowing she won't be able to get in. (Y/N) agrees, since her sister is the most important person in her life, and gets her into Yuuei, hesitating on wether to write Ali's name or her own.
(Y/N) attends Yuuei for her sister for the first 3 weeks, and begins to fall in love with a boy named Katsuki Bakugou. Just as the boy began to realise his feelings for her, Ali is allowed to attend school again, and ends up dating Katsuki, breaking her sisters heart unknowingly.
Will (Y/N) tell Katsuki it was really her all along, or will she let her sister be happy?
-I do not own My Hero Academia or any of its characters. I only own Ali.