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...
See? Even when you're big, 
it's good to kiss someone you love.
،أرأيتن؟ حتّى عندما تكبرن
.فإنّ تقبيل الذي تحببنه أمرٌ جيّد
Hört, auch wenn man groß ist,
darf man anderen Küsschen geben.
¿Ven? Aunque sean grandes,
está bien besar a quien quieren.
¿Veis? Aunque seáis grandes,
está bien besar a quien queráis.
Même grandes, c’est bien
de faire des bisous à ceux qu’on aime.
Visto? Anche quando si è grandi,
si possono baciare le persone a cui si vuole bene.
Viram? Mesmo quando você é grande,
é bom beijar alguém que você ama.
Ну вот, даже взрослые 
могут целовать тех, кого любят.