Having come to Canada upon hearing the fake news that his biological mother Haruko is in critical condition, high school student Kaidou Haru meets a young boy named Ren. "You have a new brother. Take care of him." So instructed by his mother, Haru is forced to spend the summer with Ren. Every day is a battle with Ren, who refuses to listen to anybody. However, as Ren grows to like Haru little by little and Haru comes to adore Ren as well, they make a certain "promise"...
It's bath time for you when we get back.
Daheim geht’s erst mal ins Bad! Am Mittag
hab ich dich auch entkommen lassen.
Cuando volvamos
 tendrás que bañarte.
Cuando volvamos
 tendrás que bañarte.
Tu prendras un bain en rentrant !
Appena a casa,
subito un bel bagno!
Assim que voltarmos, você vai direto para o banho!
No almoço você conseguiu fugir.