You and Tooru have been dating for a while, but ever since he got his popularity and fame ahead of him, he has been pretty stupid, letting those swarms of girls who surrounded him on a daily get his thoughts ahead of him. Letting his ego inflate like a balloon. It was all too much.
You weren’t very happy and just wanted to go back the basics, but he just never listens. Your friends could see he was just no good, coaxing you into breaking up with him or taking a break, to which you listened. And, gosh, things were better.
But just a few months later, he tried to get back with you. Getting his friends to convince you that he's changed for the better, setting up blind dates between the two, leaving lunches on your desk, etc, but you could tell Tooru bribed them into doing that.