My Bride Is a Mermaid is a Japanese manga series written by Tahiko Kimura. A 26-episode anime television series adaptation animated by Gonzo. The story of My Bride Is a Mermaid revolves around a young teenage boy named Nagasumi Michishio. One day during his summer vacation at the Seto Inland Sea, Nagasumi is saved from drowning by a mermaid named Sun Seto. Under mermaid law however, either the mermaid whose identity was revealed or the human who saw the mermaid must be executed. In an attempt to save both Nagasumi and Sun's lives, Sun's family (which is the head of a mermaid Yakuza group) reluctantly decides that the two are to be married.