Hisame Furaba Koi Chigiri氷雨降らば恋契り; Ngày Mưa Lạnh Đôi Mình Hẹn Ước; Nếu Trời Đổ Mưa Lạnh Thì Se Duyên Cho Đôi Ta; 비가 내리면 사랑의 맹세를; When The Freezing Rain Falls, We Pledge Our Love

"I'll have you join me in matrimony..." Toono Itsuki is a university student who majors in folkore studies. He's currently headed towards his grandparents' hometown as part of his thesis' fieldwork. There, a local warned him to "not get close to the mountain on days when the rain is cold". Despite the warning, Itsuki still went towards it and there he met!? Here's a BL about a local god and a folklore geek!