He heads back to Kagari , who thanks him for the good memories he was able to give her .
Since he was too late to prevent the world 's destruction , Kotarou unwillingly stabs Kagari and then collapses .
He heads back to Kagari , who thanks him for the good memories he was able to give her , but since he was too late to prevent the world 's destruction , Kotarou unwillingly stabs Kagari and then collapses .