瀬戸の花嫁•Seto no Hanayome

My Bride is a Mermaid

A young boy gets saved from drowning by a mermaid but, according to mermaid law, if a human sees a mermaid's true form, both have to be killed. The only solution to the problem is for him to marry her. But can they keep her secret from being found out? (Source: Animewaves)