Soon after the killing began, Ryouta chose to pick up a shotgun, intending to murder Junko and Mukuro to avenge Kotomi's death. Sousuke Ichino attempted to take the gun away from him, and they tussled over it before Soushun told them to stop. But when Sousuke let go of the gun, Ryouta stumbled backwards and was stabbed from behind by Karen, killing him.