Keiyaku Shimasho: Otsukaresama Joshi, Sewayaki Akuma to Kurasu

A demon named Adele appears before Hitsuji, a single office worker who leads a busy life! After making a contract with the demon, Hitsuji and Adele begin living together. While their life as a demon and a human may seem odd, it turns out to be surprisingly comfortable...!?

(Source: Web Comic Apanta, translated)