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.
I-Impossible!
!مـ-مستحيل
U-Unmöglich!
N-Non è possibile!
N-Não pode ser...
Не... не может быть!