Nanatsu no Taizai OVA
English title: The Seven Deadly Sins: Ban's Side Story OVA
Japanese title: 七つの大罪
Type: OVA
Episodes: 2
Source: Manga
Genres: Action, Adventure, Fantasy
Studios: A-1 Pictures
Producers: Aniplex
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older

OVA bundled with the 15th and 16th volume of the manga.

15th volume DVD will feature the sin of greed as the central character.

16th volume DVD will feature side stories of the main characters in omnibus format.

(Source: MAL News)