Keishichou Tokumubu Tokushu Kyouakuhan Taisakushitsu Dainanaka: Tokunana - Ichinen Mae, Nijou Kujaku no Urei
English title: Special 7: Special Crime Investigation Unit Episode 0.5
Japanese title: 警視庁 特務部 特殊凶悪犯対策室 第七課 -トクナナ- OVA File.0.5「一年前、二条クジャクの憂い」
Type: OVA
Episodes: 1
Source: Original
Genres: Action, Fantasy, Mystery
Studios: Anima&Co.
Duration: 23 min

The OVA will be focus on when Kujaku Nijou first entering group, which occurs one year before the main anime begins.