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
One Pound Gospel
OVA
50m
Power Stone
TV
20m
Project A-ko: Love & Robots
OVA
53m
Wandering Sun
TV
24m
Shounan Bakusouzoku
OVA
52m
Phantom Quest Corp.
OVA
30m
Phantasy Star Online 2 Comic
ONA
3m
Seiyu's Life!: Petit Uchiage
Special
14m
A Certain Magical Index III: Specials
Special
9m
When the Seagulls Cry Specials
Special
1m
Nozo x Kimi
OVA
23m
Robot Girls Z
Special
27m
Toward the Terra
Movie
111m
Girls Bravo
TV
23m
Black and White Warriors
ONA
15m