Koneko Monogatari (The Adventures of Chatran)
Nagasumi finds a kitten and brings it to school. Nagasumi soon discovers that Sun, Lunar, and Maki are all deathly afraid of cats, and gets the idea to test it on Kai and Gōzaburō too, but before that learns that most mermaid adults are not afraid of cats anymore as they eventually get over their fear; this however does not apply to Gōzaburō due to a tragic experience as a child. Nagasumi decides to make this into an advantage.
Aired 09/07/2007EP 14 - Koneko Monogatari (The Adventures of Chatran)
My Bride is a Mermaid
Michishio Nagasumi's life couldn't be any more normal. In an odd twist of events, during his summer vacation he ends up almost drowning in the sea. Luckily, the cute mermaid Seto San appears to save him. However, San is from a yakuza mermaid family and according to their law, if a human is to catch sight of a mermaid, either he or the mermaid must die. The only other way is for Nagasumi to be taken in as a family member, marrying San. In attempts to save both of their lives, Nagasumi asks for San's hand in marriage. Nagasumi's summer vacation reaped more then what he would expect, as he must now protect San from others finding her secret out.