Osamu Nishi began her career as a manga artists in 2011 and had her first serialized story, Hotel Helheim, published in Jump Square magazine in 2014. Her second series, Welcome to Demon School! Iruma-kun, has been running in Shonen Champion magazine since 2017 and gone on to be a hit anime series. The manga version of Welcome to Demon School! Iruma-kun will be the first time that any of her series have been published in English.