Her boyfriend is clueless about it all but when she comes clean he's supportive and offers his help. This girl is a terrible prostitute making it very clear to her clients that she's not interested in anything and she doesn't even act or pretend to enjoy her encounters. Not only that but she also has her customers pay her after the fact. And eventually it backfires when a guy pays only a fraction of the agreed fee. That drives her mad and puts a strain on her relationship.
When she needs a laptop she again meets with her first regular. He wants to do more kinky stuff, but she refuses, runs away in disgust, still she takes the laptop, and he pays her on top off that. Now she's starting to have second thoughts about this career. But she agrees to meet the guy one last time. He takes her to some sex club. He knows all the guys there. He takes her to the dungeon there where two much older guys wait. Next we see her leaving in disgust. Presumably he made her have sex with the two? We don't know. This time he only pays her a part of her fees.
When she decides to move to Paris the old guy calls her again with sob stories that he's got cancer and that he wants to see her one last time, and pay her thousands. In Paris, she gets a job as a waitress but she finds it all so difficult. Still she thrives. She returns to her hometown to take her exams. She studied languages and passes the exams.
The movie begins and ends with Laura in a wig, doing some TV interview. The movie aims to alert the society how precarious the situation is for French college students and how many girls have to resort to prostitution. However, Student Services makes a very poor case for whatever point it's trying to make. I saw this movie years after seeing Young & Beautiful, another lackluster French movie about the exact same topic but that one was a bit more compelling. Student Service has little going for it in terms of characters, story, or titillation. Déborah François is cute in a normal girl sort of way but that's about it.