Level 1 Demon Lord and One Room Hero manga volume 3 features story and art by Toufu.

Just as Max and the Demon Lord return from the Gunmar Republic, Zenia, the Lord’s trusty and lusty secretary, commences the infiltration of Fred the Cleric’s Sorcery Agency. But while Zenia and her master fumble their way into trouble, the schemes of humanity are set into motion. Will Max be a hero once more, and whose side will he be on? That of his species, or his new demonkin roomies?