35-sai Dokushin Yamada, Isekai Mura ni Risou no Second House wo Tsukuritai: Isekai to Genjitsu no Iitokodori Life

Yamada, who works as an ordinary company employee, goes to visit the family home left behind as an inheritance by his late grandfather, and there he finds a door to another world!! Beyond the door, he meets a talking black cat and a homunculus girl, and as he begins living together with them, he enjoys a cheat magic life in modern Japan and a heartwarming slow life in another world♪ The best-of-both-worlds life of 35-year-old bachelor Yamada, between another world and reality, begins!

(Source: Kadokawa, translated)