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 don't know! Please let me go!
!لا أعلم! دعني أذهب أرجوك
Ich weiß es nicht! Bitte lass mich gehen!
¡No lo sé! ¡Por favor, deja que me vaya!
¡No lo sé! ¡Por favor, deja que me vaya!
Je sais pas !
Laisse-moi, je t’en prie !
Non lo so! Lasciami andare, ti prego!
Eu não sei! Me solte, por favor!
Не знаю я... Отпусти меня!