The stroy flows smoothly, without gaping holes like manga of similer stories in this genre. The characters are all apealing and likeable. The comedy seems natural and is actually funny.
Nagasumi is a young man studying in the city of Saitama. In the summer vacation, he goes with his parents to Seto, where his grandmother lives. On the beach of Seto. Nagasumi drowns at sea, being saved by a mermaid named Sun , daughter of the chief of the clan of newts and local Yakuza, Gouzaburou Seto. Tradition says that when a man finds out about the existence of newts , he should be killed, along with those who left to be discovered by human. But to avoid that someone dies, the mother of Sun proposes an alternative: that the two are married, that would keep the secret within the family, the father reluctantly.