A first-year student at Shirataki High School. After losing his mother at a young age and with his father often away from work, Ageha lives with his older sister, Fubuki. Though quick to throw a punch, he has a strong sense of justice and can’t ignore those in need. His fierce loyalty to his friends and family drives him forward. Everything changes when he picks up a mysterious “red phone card” and is drawn into a deadly game.