MCs and FMCs relationship gets revealed, they break up as MC doesn't want her career being ruined, so he runs back to his ex GF who actually missed him (seems like she got sexually frustrated as her new wealthy pimp (Nerd) wasn't able to satisfy her sexual desires completely). At this point you would be heavily disappointed in the MC for dropping his dignity and running back to his annoying ex GF who just cheated on him and even throw him out after being discovered, right? But he just uses her to fastly get a roof over his head again. He. Rejects. Her. Sexual. Advances. EVERYTIME!
Later the Nerd verbally attacks MC as he thinks MC stole his girl (he didn't know that MC was ex GFs former BF since she denied having a BF). They talk it out and Nerd starts to dislike the ex GF too. Long story short, in the end MC dumps ex GF again, Nerd then rejects her too so she ends up alone for being a bitch.