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.
| Actor | Role |
|---|---|
 NonOgawa Tamae | Ogawa Tamae |
 Mugi KadowakiTenma Kanae | Tenma Kanae |
 Yuko OshimaTenma Nozomi | Tenma Nozomi |
 Kengo KoraUdo Kazuma | Udo Kazuma |
 Kasumi YamayaAshizawa Yuna | Ashizawa Yuna |
 Riku HagiwaraSaotome Kaito | Saotome Kaito |
 Hiroyuki HirayamaSaotome Katsuzo | Saotome Katsuzo |
 Toshiro YanagibaUdo Genichi | Udo Genichi |
 Masatoshi NakamuraTakeshi Horai | Takeshi Horai |
 Yoshiko MitaZaizen Reiko | Zaizen Reiko |
 Masatoshi NagaseOgawa Kiyoshi | Ogawa Kiyoshi |
 Shinobu TerajimaTenma Keiko | Tenma Keiko |
 Ko ShibasakiIzuko | Izuko |