this is bfbronpa it's like Danganronpa where there are students trapped in the school and you have to kill each other for 9 chapters and there is a class trial to see who murdered and the murder is called the blackend

You wake up in a classroom the only thing you remember is waking in the school and you walk in the gym where you see 63 people then 4 and x appear

4: I'm the head master

X: I'm 4's assistant you all are in a killing game called

4: bfbronpa all 64 of you will compete