Oide yo, Mamono Bokujou! Inaka de Hajimeru Mattari Slow Life

Adel was a member of the Magic Knight Order of the Sigmund Kingdom. At the age of 25, he was beginning to fret about his future, but in the end, he decided to leave the order. Right then, his coworker Refea recommended him a job as a monster breeder. She was a monster researcher and sought the help of Adel to investigate the ecology of monsters. Fortunately for her, he also held an interest in monsters and agreed to work with her. Thus, he was about to start a monster ranch at his hometown of Leaflet Village, but he was told that he needed to procure the monsters for raising by himself… The relaxed life of Adel as he raises cute and fluffy monsters starts now! Source: KADOKAWA