(Spin-off of Welcome to Demon School, Izuku-kun!)(crossposted on A03)(co-authored by Hazard Overflow) Iruma Suzuki, a boy just doing his job to survive in a difficult world, meets a hero, and suddenly his life is much more dangerous and happy at the same time.(Double update today!)

Izuku and Inko get adopted by Sullivan, and cause the Demon World untold levels of potential change. Act 2-Survival of the Fittest (Co-authored by Hazard Overflow, cross-posted on A03)

After getting used to his life in the Demon World, one spell (or two, or a catastrophe) gone wrong leads Iruma to return to the Human World, but does that kid have engine legs? These clearly aren't the humans Iruma is used to, and he is one! Will Iruma ever have a normal life? Probably not, so Welcome to Hero School Iruma-Kun!