
Quick answer — Akihiro Sekiyama worked on Welcome to Demon School! Iruma-kun (Animation Producer), Problem Children Are Coming From Another World, Aren't They? OVA (Animation Producer), Gingitsune: Messenger Fox of the Gods (Animation Producer).
Akihiro Sekiyama worked on Welcome to Demon School! Iruma-kun (Animation Producer), Problem Children Are Coming From Another World, Aren't They? OVA (Animation Producer), Gingitsune: Messenger Fox of the Gods (Animation Producer).