Umi Monogatari: Marin no Kore Naani?
English title: Umi Monogatari: Marin's "What Is This?"
Japanese title: うみものがたり マリンのこれなぁに？
Type: Special
Episodes: 4
Source: Game
Genres: Comedy
Studios: Zexcs
Duration: 2 min per ep
Rating: PG-13 - Teens 13 or older

DVD/Blu-ray specials of Umi Monogatari.