Persona: Tsumi to Bachi

This story is a spin-off to the Persona 2 duology of games by Atlus starring a young man named Kazumi Kiba. Kazumi thought he was good friends with a boy he had known for ten years, Rihito. One day, while they were out in town together looking for a shop selling masks for their school's masquerade ball, Rihito suddenly disappears. Kazumi drops out of school and starts looking for him, and will soon set foot in a totally new world.