Sungjae, an ordinary guy, finds himself trapped in the historical Joseon era! The only way he can break the curse and return to his modern life? He must write the ultimate, comprehensive manual on "lovemaking"! This isn't just a challenge; it's a mission that requires deep research and hands-on experience.

Being transported back in time is one thing, but becoming a sexologist in a conservative era is another! Sungjae must navigate court politics and traditional norms while gathering the necessary material to complete his explicit manuscript. This task forces him into intimate situations with various beautiful women who are eager to assist in his 'research.'

Will Sungjae manage to finish the controversial book and finally find the key to go home? Or will he get too caught up in the pleasures of his new "job" and decide the Joseon era isn't so bad after all? Find out in this extremely steamy, uncensored historical romp!