Kamisama wa XX ga Osuki

Kei Tsukishiro was lost in the mountains. What appeared there was a mountain god, Tenpyo Miju Ukajin (commonly known as Tama). Tama, who felt that his magical power had declined due to the decrease in the number of believers due to depopulation, approached Kei to gain vitality by having sex with him ...! ?? An exotic love between a healthy and savvy mountain god and a kind-hearted young man who wants to regain their magical power through human interaction! (Source: Japanese publisher, translated)