Well, we know why she's acting like this now. She was head over heels... Can't say I understand why though.
@TheStuffedUnic agreeing that
@Koyomiya is giving him too much creditThe flashback itself is forgivable as a mistake... But trying to get her back, aggressively and like he owns her, is what makes him truly awful. 100% thinking about himself. Entire things comes off as emotionally abusive on a stupidly lovestruck girl(mannnnn this is where the family is supposed to step in and chase the bad ex away. I want an chapter with her parents -- or even another friend -- NOW.)
At least MC is comedic. MY BEANS DISSOLVED.