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...
Hime-neetan is my onee-tan!
!هيمي-نيتان هي أونيتان الخاصة بي
Hime ist meine Schwester!
¡Hime es mía!
¡Hime es mía!
C’est ma Hime à moi ! Y a que moi
qui peux lui faire des bisous !
La sorellina Hime è la mia sorellina!
A Hime nee-tan é a minha Onee-tan!
Сестрёнка Химе — моя сестрёнка!