Sekai Saikyou no Kami Kedamono Tsukai (Associated Names)

A boy named Mug, who lives in a remote town, turns fifteen and is given a skill in a coming of age ceremony. Mug wanted to live a quiet life, but the skill he was given was 【Decoy】, which always attracts demons. Mug was driven away to a cabin deep in the mountains because it…