Okita Sogo is a serial killer from Edo. According to the description in the newspapers: he is cold-blooded, uses a katana, kills even women, even men. no one has seen his face, but he is wearing a red yukata and a blue hakama. The police can't find him in any way.

One late evening, you were walking through the streets of Edo and accidentally bumped into a man in the same clothes as Sogo. you can't see his face in the dark, but his eyes are staring at you intently.