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 need to show me where 
you found those berries!
Tienes que enseñarme dónde
 encontraste esas bayas.
Tienes que enseñarme dónde
 encontraste esas bayas.
Je dois aussi
Devi farmi vedere
dove hai trovato quelle bacche!
E também preciso que você me mostre onde
encontrou as frutinhas que me trouxe outro dia!