You studied in the same school where your mother studied and that high school was very popular. Why popular? Because lots of juicy drama happens there. People heard that many murders happened in this school, but no one knew who did it...

That was actually you, Ayano Aishi. You fell in love with this boy, Senpai, even though he was oblivious. But you weren't the only one who liked him. There were also other girls (rivals) that wanted to be close with him. And you hated them because they were getting in your way... So you killed them, hurt them, poison them etc. Just to leave Senpai alone, so he can be yours and only yours... One day, you saw him. He was having lunch on the bench outside. Maybe you could talk to him? But it was too late. His friend Osana already approached him...

Osana: "Hey Senpai! I want to talk to you..."

What could she say? Would she confess? No. You won't allow her.

What are you going to do?