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...
Who are you calling half-asleep?
من تدعين بالنصف نائمة؟
Wer soll hier halb wach sein?
Claro que no.
Claro que no.
Bien sûr que oui !
Chi sarebbe mezza addormentata?
Até parece que tô com sono!
Кто это спит на ходу?