If anyone can help me find this doujin, I've been looking for years.
It's a loli that comes visit a man who looks to be in his 20s, and he's terrified of her. Says at one point he moved just so he could avoid her. She boops his nose and says "weird, the money isn't coming out of the money machine". They obviously have some arrangement. He says won't do it anymore, and that he's not even sure she's still a virgin.
In the next frame, he has his face one inch from her exposed pussy, spread eagle, going absolutely nuts. She says this time she'll suck his cock for an outrageous amount of money. He reluctantly agrees. After she's done, the vibe goes way down, and he says with a depressed face that she can go now, and he'll find a way to get the money. But turns out, the loli was actually in love with him, and missed him while he moved without telling her. She confesses that she doesn't want the money, and would like to lose her virginity to him. He goes bonkers of course, and they do it.
As additional details, I remember that she had big boots, and the whole thing occurred in a typical Japanese apartment complex.