For the life of me I can not remember the title of this doujin. Here is the plot as I remember it. Sorry if it's a bit vague.
OK so it opens up with four high school girls talking to each other in class. Three of them go on about their latest purchases while the fourth one pipes up about being broke. One of them jokes that the broke girl should sell her body. Broke girl says she would not do it even if the ugliest guy paid her to. Transition to outside where ugly guy(tall fuck that looks like Chad's ugly cousin from Bleach) confronts her for sex. She refuses, he offer's her a shit ton of money, and she accepts. The next remaining pages is them fucking, putting on costumes for more money, and fuck some more. It ends with the girl talking to her friends about her recent purchase, only to be mocked and needing more money.
Sorry for the shitty description but hopefully I can get a name or a hint. Thanks in advance!