Dappou Tamer no Nariagari Boukentan: S-Rank Bishoujo Boukensha ga Ore no Juuma ni Natteimasu THE COMIC

Although the tamer Lint despised his low-grade job, he earned money everyday with his demon partner. In the royal capital, a mysterious S-rank adventurer girl calls out to him. "Ah, won't you tame me?" Her unexpected proposal overwhelms Lint. However, from here on out is where his rise begins...