Shuuichirou Kudou is a young doctor who rescues Kohaku from the tree where she is trapped. For this he is granted a wish, but isn't interested as he has everything he wants.

Shuuichirou is generally kind and trusting, but isn't one to seek other people's company—something that is remedied throughout the course of the story by the two angels, two demons and two servant demons who all move into his house.