Other names:
Level One Demon Lord and One-Room Hero; Level 1 Teufel und der Einraum Held; Level One Demon Lord & One-Room Hero; Lv1 Maou to One-Room Yuusha; LV1 마왕과 원룸 용사; Lv1魔王とワンルーム勇者; The Level One Demon Lord and the One-Room Hero
A manga about the newly resurrected demon lord who wants a rematch against the legendary hero but finds him in a sorry state and living out of a one room apartment.