Takuya Muramatsu is a student of Kunugigaoka Junior High School. He is assigned to Class 3-E, where he trains to become a professional assassin, with his teacher as the target. He hangs out with Ry�ma Terasaka's group. Muramatsu is first shown to be an inconsiderate student who follows Terasaka's orders, though he has no unique abilities, Muramatsu is talented in the kitchen and plans to take over his family's ramen shop.