Upon hearing news that his mother was on verge of death, Haru Kaidou—the eldest son of the family—flies all the way to Canada. The moment he arrives, he learns that not only did his mother fool him, but he is also supposed to take care of his adoptive brother, Ren Kaidou, an antisocial kid who feels more comfortable around dogs than people.
Due to his new brother's distrustful nature, Haru initially has a hard time reaching out to Ren but their relationship eventually grows. He makes a promise to Ren: they will live together in Japan after Haru graduates from high school. However, due to an unfortunate accident, Haru loses all memories of the summer they spent together, including the promise he made. Five years later, expecting Haru to keep his promise, Ren arrives in Tokyo; but to Haru, Ren is just a random boy claiming to be his brother.
[Written by MAL Rewrite]+ More
Characters & Voice Actors

Asakura, Ayumi
Supporting
Dieckmann, Haruko Daniela
Supporting
Kaidou, Aki
Supporting
Kaidou, Shima
Supporting
Kashiwagi, Mikiko
Supporting
Kondou, Kiri
Supporting
Kurosaki, Juuzen
Supporting
Sasaki, Ikuyoshi
SupportingRecommended for you
Flying Witch
TV
23m
Guilty Crown
TV
24m
Hell Teacher Nube
TV
24m
Aa! Megami-sama! (TV) Specials
Special
24m
After the Rain
TV
22m
Ah! My Goddess: Flights of Fancy Specials
Special
24m
Air Gear
TV
24m
Sweetness & Lightning
TV
24m
Amagi Brilliant Park
TV
24m
Fairy Tail Movie 2: Dragon Cry
Movie
84m
Nadia: Secret of Blue Water
TV
25m
Golgo 13
TV
24m
Looking Up At The Half-Moon
TV
24m
Hello!! KINMOZA!
TV
23m