Look at this S! Cupid's Prank - Vol. 1 Ch. 1

[MangaDex]

 

[PuddenJelly]

For some odd reason if this gets an anime adaptation I feel studio shaft will be nice for it but its jus my opinion

 

[Kaarme]

Birthmark? Dude, it's a tattoo. No amount of calling it a birthmark would make a single person out of a thousand believe it's a birthmark. However, since in Japan only criminals and foreign barbarians are supposed to have tattoos, I can see why he's trying to deceive himself by claiming it's a birthmark. Not that it would help him since nobody else would believe it.

 

[TucoBenedicto]

Well, I knew the premise of the story all along, but still... that went from 0 to 100 quite abruptly.

 

[etriuswimbleton]

Blowjob in the first chapter!? Okay im now following this manga.