The main girl was kind of plain with short? black hair and the guy was a super flashy player who slept with a lot of girls, and they were childhood friends but had a falling out in high school, but since her mum was friends with his mum she was forced to visit him in college and then they reconnected. The dynamic is super similar to Sweet Black by Mai Nishikata and I think it was either a oneshot or very short like a couple of chapters at most