Special Crime Investigation Unit - Special 7 OVA

Keishicho Tokumu-bu Tokushu Kyoaku-han Taisaku-Shitsu Dai-Nana-ka: Tokunana OVA File 0.5

Episode 0.5 included in the second Blu-ray volume. The episode focuses on Kujaku Nijou, when he first joined the team, one year before the anime begins.