one question. please help

So my friend told me about this drama and I liked it but she does not remember the name it's basically in school and there is a popular guy which cuts his wrist and says that the female lead did it and his fans get payback on her and so she starts to get bullied but her best friend helps her and after she turns into a badass and everyone starts liking her and also the popular guy who didn't notice it was her at first plus she is from a gangster family. Thank you for your time!