Webtoon or manhwa or manhua?

I don't think it was a manga but webtoon about delinquents moving to a new school made for delinquents in like the middle of nowhere and the mc forgot who he was and gets mistaken for a strong person since he took down someone. But the real person goes to confront the mc on the roof. it turns out the character is a girl and told the mc to pretend to be her? Or something but in the end, it turns out the mc is super strong and he was trained to fight at the place he grew up when he was young?

I forgot and want to read this again