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.
tooi te wo maneiteiru shoutai wa
truth or lie?
Ist die einladende Hand
in der Ferne Wahrheit oder Lüge?
¿Es la mano que te llama
a lo lejos verdadera o real?
¿Es la mano que te llama
a lo lejos verdadera o real?
Cette main au loin qui t’appelle
Vérité ou mensonge ?
O convite da mão que vem de 
longe é verdade ou mentira?
Вдалеке кто-то протягивает руку.
Мне не мерещится?