Spurred on by Kotori 's love for Pero despite caring for him being nothing more than a duty to her , Kotarou decides to leave Martel .
When Pero gets loose , Kotaoru searches for him and brings him back to Kotori , but Pero dies shortly after that .
Spurred on by Kotori 's love for Pero despite caring for him being nothing more than a duty to Kotori , Kotarou decides to leave Martel .
When Pero gets loose , Kotaoru searches for him and brings him back to Kotori , but Pero dies shortly after that .