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.
Shoes on the ground.
حِذاء في الأرض
Schuhe auf dem Boden.
Zapatos en el piso.
Zapatos en el suelo.
E delle scarpe abbandonate.
Sapatos no chão.
Брошенная обувь.