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"...
She's taken in another new pup recently,
Letztens kam ein neuer
Hundewelpe hinzu.
Hace poco acogió a un nuevo cachorro
Hace poco acogió a un nuevo cachorro
Dernièrement, 
elle a encore recueilli un chiot.
Di recente ha preso con sé un nuovo cucciolo
Nesses últimos dias
chegou mais um "cachorrinho" lá