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"...
and he was the one that 
the dogs really took a liking to.
Und die Hunde schienen
dieses Kind sehr zu mögen.
y él era el único al que se le acercaron.
y él era el único al que se le acercaron.
Les chiens se sont pris
d’affection pour cet enfant.
e lui è quello che avevano preso
in simpatia più di tutti.
E os cachorros gostaram 
 muito daquela criança.