Sue-chan, the youngest of the Mitama family, has a weak constitution. Manami and her triplet sisters are always worrying about her. On the other hand, Himeno's niece, Shino-chan, isa very curious girl. She asks Himeno all kinds of questions as they go for a walk, and looks adorable doing it. All the little ones—Himeno's niece Shino-chan, as well as Manami's triplet sisters and baby sister Sue-chan—live their own stories.
So when both of you are old 
enough to be onee-chans,
لذا عندما تصبحان كبيرتين بما
،يكفي لأن تصبحا أوني-تشان
Ihr müsst das also auch euren kleinen
Schwestern beibringen, wenn ihr groß seid.
Por eso cuando crezcan y sean mayores
Por eso cuando crezcáis y seáis mayores
Alors Maki, Mii,
quand vous serez grandes,
Quindi, quando voi due sarete
grandi abbastanza per essere delle sorellone,
Por isso, quando vocês tiverem
idade pra ser onee-chans,
Поэтому, когда вы сами немного 
подрастёте,