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.
For what?!
!لماذا؟
Zu welchem Zweck?
¡¿Por qué?!
¡¿Por qué?!
Pourquoi ?
A che scopo?!
Para quê?
Для чего?