Anime Tenchou

Description : A new Animate is opening up, and things are looking tight without the manager. Unfortunately, he won't make it - one young man, Anizawa, has been bestowed his position in his stead! Learn alongside Anizawa the ins-and-outs of running an Animate, along with various anime production merch and events.
A work meant to promote the anime goods shop Animate, packed with Shimamoto's nekketsu (hot-blooded) flavor. Though serialized in different magazines, it is printed under Studio DNA (now Ichijinsha)'s Comic Zero Sum imprint.

Link:
(https://www.animenewsnetwork.com/encyclopedia/anime.php?id=358) (OVA)