Looking for a loli doujin i've been looking for for years and never found it again.
The story is of a loli who is blackmailing an adult for sex. He states that he has moved just to avoid her, and the doujin starts with her ringing at his door. I remember he was terrorized, and she booped him on the nose saying "hey that's weird, i'm pressing theb utton on the money machine but money isn't coming out". He tried to push her away, and says that he's not even sure she's a virgin anymore. The next panel is the guy losing his fucking mind, his face inches from her spread pussy, as she's smiling. apparently their arrangement was him just jerking off to the view, and he has never touched her before. After teasing him a bit, she offers to give him a blowjob, for an outrageous amount of money. Driven mad, he accepts, and she does it. After she's done, the guy mood's shifts drastically. He gets gloomy and depressed, and tells her to just go away, and he'll manage to get the money somehow.
But plot twist, she was actually in love with him all along, says she doesn't want the money, and says she wants to lose her virginity to him. And that's pretty much what happens next.
for additional details, this happened in a typical japanese apartment complex, and the girl wore big boots. I also think she had green hair on the cover, but it's been so long, i might be remembering this wrong (the doujin was not full color)