According to Natalie , an original short OVA will be bundled with "Ashiaraiyashiki no Jūnin-tachi" manga vol.10 Limited Edition. It will be released on March 25.
Cover of Ashiaraiyashiki no Junin Tachi vol.8
A battle fantasy manga. More than twenty years ago, an evil summoner committed "Great Summon". One third of human beings were killed, and devils and monsters invaded the earth. One day, a painter Tamura Fukutaro moves in an apartment house called "Ashiaraiyashiki" and gets involved in the troubles of his non-human neighbors. It's the beginning of a severe battle among gods, devils and the ruler "The Central".
Sources: Comic Natalie
Story by ZerOne01