I was reading this manga and one of the main characters is in love with this older woman who has a boyfriend. She spends all her time with him because her boyfriend always works. She confided in him constantly and he was her moral support, but you find out she's basically using him and only see him as a little brother.

That had me wondering if there's any manga where the main girl uses the main guy in any kind of way (basically takes advantage of him) like moral support, but doesn't fall for him until later while the main guy is in love with her from the start.

Sounds pretty much exactly like the plot of kimi wa pet if I remember right.

Quote from msianide

Sounds pretty much exactly like the plot of kimi wa pet if I remember right.

Oh, I've read Kimi Wa Pet. It was really good. Thanks for the suggestion though.

Bitou Lollipop

She dates the main guy at first, but then breaks up with him because she falls for this other guy who's a douche. She uses the main guy as moral support and eventually falls for him. She kinda treats the main guy like shit for a good bit.