A new spin-off based on Mairimashita! Iruma-kun follows the “Boku Alliance” trio Iruma, Lied, and Purson as they venture into the world of gaming. The series is illustrated by Konisuke (Tenshi to Akuma Meshi). Osamu Nishi is credited with the original story concept, while Atsu Tsudanuma, known for Makai no Shuyaku wa Wareware da!, is credited as the story writer.