Seto no Hanayome OVA
English name: My Bride is a Mermaid OVA
Genres: Comedy, Romance
Type: OVA, Episodes: 2
Aired: Nov 3, 2008 to Jan 5, 2009
Studio: Gonzo, AIC
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
The Seto no Hanayome OVAs are new stand alone shorts with characters from the series and also two new ones. It is now the third year of school, San and Luna's dads are still being over protective. All the while Nagasumi has his hands full trying to keep everyone around him under control and rescuing damsels in distress. 

(Source: ANN)