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"...
there's a problem with forcing that 
child to live socially right now.
será un problema obligar 
a ese niño a cooperar.
será un problema obligar 
a ese niño a cooperar.
il est encore trop tôt
pour le laisser
al momento non è così semplice far vivere
 quel bambino in mezzo alla gente.
ainda estou insegura quanto a
fazer aquele garoto ter uma rotina comum.