Seto no Hanayome
English title: My Bride is a Mermaid
Japanese title: 瀬戸の花嫁
Alternative titles: The Inland Sea Bride
Type: TV
Source: Manga
Episodes: 26
Status: Finished Airing
Aired: Apr 2, 2007 to Oct 1, 2007
Broadcast: Mondays at 02:00 (JST)
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Gonzo, AIC
Producers: TV Tokyo, Square Enix, Sotsu
Licensors: Funimation
Genres: Comedy, Romance, Supernatural
Themes: Organized Crime, Parody, School
Demographics: Shounen

During his summer vacation, middle school student Nagasumi Michishio travels to the Seto Inland Sea. One day, while swimming at Mio Sun Beach, his leg suddenly cramps. No one is close enough to notice his desperate screams for help, and so he sinks into the ocean, where he is left to drown alone. Just as he loses consciousness, however, a mermaid appears and saves his life.

That night, Nagasumi is visited by his savior, a girl who introduces herself as Sun Seto—a mermaid from a yakuza family. As it turns out, under mermaid law, a mermaid whose identity is revealed to a human must be punished by execution. To avoid this harrowing outcome, the Seto family propose a solution: Nagasumi must marry Sun or die at the hands of Gouzaburou, Sun's father and boss of the Seto clan. Faced with no other option, Nagasumi takes her hand in marriage.

Now, the newlyweds face the difficult task of keeping their relationship secret. Between Gouzaburou's unending attempts on Nagasumi's life and the eccentric antics of a slew of antagonists, a genuine and innocent love blossoms between the pair as they adapt to their new life. 

[Written by MAL Rewrite]