Akumade! At Home na Shokuba desu.

Mirumo, a first-year "new social demon," is known as a "workaholic" who finds joy in working. He goes through his training with gusto, but is discovered to be a demon and gets fired from his job. Now at a loss, Mirumo is invited by a mysterious female company president and is soon offered a job... This is a story about the hard-working life of a demon who gets excited by hard labor. (Source: Natalie, translated)