
Quick answer — Osamu Nishi worked on Welcome to Demon School! Iruma-kun Season 2 (Original Creator), Welcome to Demon School! Iruma-kun Season 4 (Original Creator), Welcome to Demon School! Iruma-kun Season 3 (Original Creator) and 1 more anime.
Osamu Nishi worked on Welcome to Demon School! Iruma-kun Season 2 (Original Creator), Welcome to Demon School! Iruma-kun Season 4 (Original Creator), Welcome to Demon School! Iruma-kun Season 3 (Original Creator), Welcome to Demon School! Iruma-kun (Original Creator).