Why is it that they never erase the contact of those people. I mean she shouldn't even have his contact info anymore if he treated her horribly, in fact she shouldn't have the contact info of anyone from her past since they all bullied her. This is the reason why they get themselves in trouble. And just like all other shoujou mangas she will keep the existence of that guy a secret from masamune leading to misunderstandings, fights and the "old reliable" (you didn't have infancy if you don't know what I mean) DRAMA.