Kaoru, a friend from the piano class Ruli once attended, has gone missing. While searching for her, Ruli and the gang find a strange dent and her shoes. And as they continue their search, Hiro is suddenly asked a mysterious riddle.
How could you side with humans?
كيف تصطفّون مع البشر؟
Vous vous êtes ralliés aux humains.
Come potete stare dalla parte degli umani?
Como pode ficar do lado dos humanos?
Вы на стороне людей?