Tenmasou is a long-established inn atop a mountain overlooking the sea, in a town called Mitsuse that exists between heaven and earth. The inn is run by Nozomi Tenma, the proprietress. Her younger sister Kanae works as a dolphin trainer. Their mother Keiko is the inn's elder proprietress, who is still resentful of her ex-husband that deserted his wife and family.
| Production | Taro Maki | Producer |
| Directing | Ryûhei Kitamura | Director |
| Writing | Ureha Shimada | Screenplay |
| Sound | Akihiko Matsumoto | Music |
| Writing | Tsutomu Takahashi | Original Story |
| Production | Shinya Nakajima | Executive Producer |
| Production | Daisuke Wada | Producer |
| Directing | Hiroki Kubota | Assistant Director |
| Sound | Koji Tamaki | Theme Song Performance |
| Sound | Ayaka | Theme Song Performance |
