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...
Looking after small children makes you 
understand the struggles a mother endures.
الاعتناء بأطفال صغار يجعلك
.تفهمين ما تتكبّد الأم عناءه
Wenn man sich um die Kleinen kümmert,
Cuidar a los pequeños te hace entender
lo que pasan las madres.
Cuidar a los pequeños te hace entender
lo que pasan las madres.
En s’occupant d’enfants,
Badare a dei bambini piccoli ti fa capire
quanti sforzi fanno le mamme.
Cuidar de crianças pequenas faz com
que você entenda o sofrimento de uma mãe.
Присматривая за маленькими детьми, 
понимаешь, как трудно матерям.