My Bride Is a Mermaid is a Japanese manga series written by Tahiko Kimura. The manga was serialized in Square Enix's shōnen manga magazine Monthly Gangan Wing from 2002 to 2008 and in Monthly Gangan Joker in 2010. In 2004, a drama CD based on the series was released by Frontier Works. The series tells a story of a young mermaid saves a young boy named Nagasumi Michisio from drowning. To avoid the wrath of her yakuza merman father, Nagasumi agrees to marry her.

Gangan is a manga imprint owned by Square Enix Holdings. It originated as a manga imprint for Enix before the company re-branded as Square Enix. It publishes manga in several anthologies aimed at different reader demographic groups in the Japanese market. Its anthologies are home to some popular Square Enix manga series which were adapted into anime series, like Fullmetal Alchemist, Moribito: Guardian of the Spirit, Nabari no Ou, Inu x Boku SS, The Case Study of Vanitas and Soul Eater. The comics are later collected in paperback volumes under brand names such as Gangan Comics , Gangan Comics Joker and Young Gangan Comics , which identify the anthology of serialisation. These paperback brand names are formed by omitting any gekkan or shōnen in the magazine name and inserting Comics directly after the word Gangan.