Two completely opposite aides serving the "Demon King." One is Rio, a young and dedicated up-and-comer. The other is Virsh, a carefree slacker. During their glorious service in the Demon King's castle, aiming for human world conquest, these two aides chat it up when the Demon King isn't around...!? (Source: Shueisha, translated)
— Description from AniList community (anilist.co).
