After Lilian's village unceremoniously throws her from a cliff as a human sacrifice to a mountain god, she is transported not to the afterlife but to a strange castle. When the lord of the castle shows up, she is shocked to be informed that not only has the village been sacrificing to him (a demon named Gylkine) and not a mountain god at all, but also that he seems to want her to bear his children!? And then, in a perhaps even more bizarre turn of events, she discovers that Gylkine has no idea how children are made! Once Lilian decides how to feel about her new circumstances, she may have to find a way to give sex ed to a demon lord.

There is a TL and R18 version.

Official Translations:
Uncensored: English (Irodori Comics, FAKKU)
Censored: S.Chinese