My Bride Is a Mermaid (2007)7.1 /10

Storyline:  While vacationing at the sea, Nagasumi nearly drowns, only to be rescued by Sun, a mermaid from a yakuza clan. Mermaid law demands death if their identity is exposed, so to avoid execution, Nagasumi is forced to marry her. Now stuck with a mobster father-in-law and chaos all around, the two face an increasingly absurd daily life.