Kang Chan, an ordinary part-time café worker, begins experiencing strange things from the day he collapsed from overwork.
It’s one erotic dream after another—so intense it feels like he’s sexually frustrated— but he can’t remember a thing except that it felt absolutely amazing... But... he can see the figure from his dreams, and it’s licking and touching him...? Who the heck are you?!
[The chaotic story of the mysterious yet affectionate Mr. Dulle and Kang Chan, a mess on the inside despite his perfect exterior♥](Source: MrBlue, translated)
— Description from AniList community (anilist.co).