Summary:
One summer event would bring junior high school student Michishio Nagasumi's peaceful life crashing down. While visiting his hometown, he almost drowns but Seto San, a mermaid, saves his life. However, her family is part of a merfolk mafia, and they abide by a strict rule: If a mermaid is discovered by a man, either he dies, or the mermaid dies. The only exception is if the man becomes a member of the family. When Nagasumi is threatened to either die or join the family, he comes to the conclusion that he must marry San. (from animeNfo.com)

Episode 1
Episode 2
Episode 3
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8
Episode 9
Episode 10
Episode 11
Episode 12
Episode 13
Episode 14
Episode 15
Episode 16
Episode 17
Episode 18
Episode 19
Episode 20
Episode 21
Episode 22
Episode 23
Episode 24
Episode 25
Episode 26