As for what happened... the novel isn't really clear on the details, but it seems nothing much. Basically it was a regular couple arguing type of thing with a possibility that cheating might or might not have happened. A big part of their breakup was multiple people getting jealous and spreading rumors. All of them wanted to hook up with her
@sgrey thats what I thought had happened to be honest. And as for the romance id be fine with none, im even fine with a little as long as it doesnt turn into a harem. Thank you for telling me!