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
Kimi no Iru Machi OVA
OVA
28m
Kyou no 5 no 2 (TV): Takarabako
OVA
28m
Mado King Granzort
TV
24m
Magic User's Club (OVA)
OVA
28m
Venus to Mamoru!
TV
22m
Sunny Ryoko
TV
25m
RIN-NE 3rd Season
TV
24m
Ling Long: Incarnation
ONA
30m
Medaka Box
TV
24m
Armitage III: Poly-Matrix
Movie
92m
Dorohedoro: Ma no Omake
Special
30m
Dragon Ball Z: Cooler's Revenge
Movie
46m
Escaflowne: A Girl in Gaea
Movie
97m
H2O: Footprints in the Sand
TV
24m
Lupin III: Nusumareta Lupin
Special
91m