Sekaiichi Hatsukoi OVA
Genres: Boys Love, Romance
Type: OVA, Episodes: 2
Aired: Mar 22, 2011 to Sep 27, 2011
Studio: Studio Deen
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
Two OVA episodes featuring additional stories. 

Episode 0: Ritsu and Takano used to date back in high school, but broke up due to a misunderstanding. This is that story. 

Episode 12.5: Hatori and Chiaki go to visit the latter's family. It's really awkward in many, many ways.