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"...
I'll leave the lunch, so eat it by yourself.
Die Lunchbox lasse
ich hier, also iss alleine.
Dejaré el almuerzo. Come solo.
Dejaré el almuerzo. Come solo.
Je te laisse le repas.
Il pranzo lo lascio qui,
mangia pure senza di me.
Vou deixar a marmita aqui,
coma sozinho.