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...
Our sister is making us stay 
home while she goes out, so...
قالت لنا أختنا أن نبقى
...في المنزل بينما هي خارجة، لذا
Unsere Schwester will,
dass wir aufs Haus aufpassen.
Mi hermana quiere
que nos quedemos en casa y…
Mi hermana quiere
que nos quedemos en casa y…
Ma sœur nous a demandé
de garder la maison…
Nostra sorella ci fa stare a casa
mentre lei è fuori, quindi...
Nossa irmã tá nos deixando em casa
enquanto dá uma saída, então...
Сестра оставляет нас дома 
за главных, так что...