Responses

Yeah, they're from a manga called Doujin. Basically a famous actor (who the uke from this manga is infatuated with since he reminds him of the seme) is in love with his friend who works for a printing company (the guy that helps out the uke during otaku event) and he writes a doujin about them having sex and the printer dude finds it. They start dating and all but eventually the uke from this story finds out and turns into the bitchy 3rd wheel in that story.
Are some of the characters from another manga??