After the death of his beloved girlfriend, police officer Kyungjoon just wants to be left alone to water his house plants and catch criminals. But after a police investigation into a mysterious cult goes supernatural, Kyungjoon finds himself unwillingly caught up in a world of demons, succubi and monsters - and the worst of them all is a demon king calling himself "Lord Cain." It turns out that in order to survive, Cain needs mana that can only be accessed through a "door" inside Kyungjoon. The problem is... how is he planning to open that door? (Source: Tappytoon)

Original Webtoon:
Bomtoon, Lezhin

Official Translation (R19):
•English: Tappytoon, Lezhin, Manta
•Japanese: Comico, Lezhin
•Others: French, French, Thai

Official Translation (R19 Uncensored):
English (Tapas), Spanish, T.Chinese

Official Translation (R15):
English: Tappytoon, Manta
Other: French

Official Book Version:
Japanese

Official Role Play Accounts:
Cain: Instagram

[color=black]*Note:

• All English platforms have the Tappytoon translation.
• The difference between 'R19' & 'R19 Uncensored', is that the 'Uncensored' has the genitals fully drawn, not white out like the original R19.*[/color]