Yamagami-sama to Okiniiri

Souichirou, an ordinary young man who works as a repairman, got lost in the mountains and was saved by a mysterious man. He suddenly kissed Souichirou's hand, and otherworldly powers like flying in the sky. To thank the man for helping him, Souichirou went into the mountains. However, when they met again, the man lost his memory...?

(Source: Shinshokan, translated)