Sekaiichi Hatsukoi OVA
Japanese title: 世界一初恋 OVA
Type: OVA
Episodes: 2
Source: Manga
Genres: Boys Love
Studios: Studio Deen
Producers: Kadokawa Shoten
Duration: 21 min per ep
Rating: PG-13 - Teens 13 or older

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.