Kaitei Sanman Mile

AdventureFantasy

Score: 5.4/10
Mean: 5.7/10
Episodes: 1
Season: 1970

~60 min per ep

Trailer

No trailer listed on AniList for this title.

About

Returning home from an ocean trip, young Isamu meets the beautiful sea-dweller Angel on a volcanic island. Attacked by a fiery dragon, Isamu and Angel escape on the observation boat See Through, and Angel invites Isamu to see her undersea kingdom of Atlas.

(Source: AniDB)