Haru desperately tries to care for Ren, a feral child who refuses to listen to a word anyone says. But it appears there are secrets surrounding the circumstances of Ren's birth, and just as Haru finally gets Ren attached to him alone, a certain tragedy strikes.

Five years later, the now grown-up Ren arrives in Tokyo and is reunited with Haru. But something is amiss...

Ren Kaidou

Voice Actor: Junko Minagawa

The fourth son of the Kaidou family. However, he has absolutely no blood ties to Haru, Aki, and Shima. He was raised in a orphanage in Canada after being abandoned in a back alley when he was young. He was then taken in by Haruko.

Haru Kaidou

Voice Actor: Tomoaki Maeno

The eldest son of the Kaidou family. Raised in Canada until he returned to Japan at the age of eight, he is a quarter Japanese. His mother is Haruko. He is half-brothers with Aki and Shima, who have a different mother. A hard worker who loves people and is good at taking care of others.

Aki Kaidou

Voice Actor: Yoshitsugu Matsuoka

The second eldest son of the Kaidou family. Shima's elder twin brother. Has the same father as Haru. Energetic and quick to catch on.

Shima Kaidou

Voice Actor: Takuma Terashima

The third son of the Kaidou family. Aki's younger twin. Has the same father as Haru. Has a cool and collected personality.

Ikuyoshi Sasaki

Voice Actor: Ayumu Murase

Haru's former colleague from his host days. His professional name is 'Iku'. His family home is a farm.

Juuzen Kurosaki

Voice Actor: Jun Fukushima

Ren's classmate and friend at Souryou Academy. Speaks with a Kansai accent.