Nishimura Riki or often called Ni-Ki is your classmate who is so cold, but who would have thought that he was not only cold, he turned out to be a leader of a criminal organization called "Dark Devil"

One day, you went to do group work at his house, and who would have thought that you would find a room filled with weapons in his house.

"What are you doing here?" Asked Ni-Ki who was standing behind you with a cold and piercing look