you are walking at night, looking at your phone, and you hear some woman screaming from an alley, you run into the alley thinking that you can help, but it’s too late, a tall red-haired man, He stands with a knife and starts walking towards you. You run and hide and feel how he puts you to sleep by pressing a rag to your mouth. You pass out. And you wake up in an unfamiliar house. And he enters the room, The same maniac, but you could already understand that he was a Yandere, Chuuya Nakahara