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.
That's a FACTION FACTION aimaina monsa
Das ist eine Faction! Faction!
Alles ist so schleierhaft!
Es un FACTION FACTION
No es nada claro
Es un FACTION FACTION
No es nada claro
C’est ça, une faction
Y a rien de clair
É uma Facção! Facção! 
Que coisa mais incerta
Интрига, интрига. Всё так неясно.