The official webite for Onihei, the television anime of Shōtarō Ikenami’s Onihei Crime Reports in Edo (Onihei Hankachō or Onihei, the Devilish Bureau Chief) novel series, announced a separate original video anime (OVA) on Tuesday.
The Onhei ~Sono Otoko, Hasegawa Heizō~ (Onihei: This Man, Heizō Hasegawa) OVA will ship on February 22, 2017.
The television anime will premiere at night on Monday, January 9 at 2:05 a.m. (effectively Tuesday morning) on TV Tokyo, TV Aichi, and TV Hokkaido.
The 40-minute OVA was actually in production before the television anime, although the television anime will premiere first in January.