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"...
You even got him in the bath. 
That's very impressive.
Außerdem hast du ihn ins Bad
gekriegt, das ist doch was!
Incluso hiciste que
 se bañara. Impresionante.
Incluso hiciste que
 se bañara. Impresionante.
Et en plus, 
il prend son bain.
Gli hai addirittura fatto fare il bagno.
È davvero notevole.
Além disso, você até fez com que ele
tomasse banho! Impressionante.