Himeno has a young cousin named Shino-chan. Manami, as well, has three young triplet sisters, and an even younger fourth sister. One day, Manami orders her triplet sisters to stay home and watch their youngest sister while she goes out. This leads the four youngest Mitama sisters to experience a truly mysterious phenomenon...
Is that something you figure 
out when you grow up?
أهذا شيء أعرفه عندما أكبر؟
¿Eso lo sabes cuando creces?
¿Eso lo sabes cuando creces?
È una cosa che si capisce solo da grandi?
Isso é algo que você entende quando cresce?
Это то, что мы поймём, когда вырастем?