I don't know about this one....
The returning girl seems to be the teasing type. The VERY teasing type, and I don't particularly like that. Also, we still don't know WHY she rejected him back then. If she rejected him because she didn't like him that way back then it's fine....
But if she rejected him because she thought it was fun to do so, and wanted to keep him tense, then it's not really fine in my book. And yes, imo that's entirely possible in this type of manga.
But the mega tsundere girl is really NO GOOD either. Because there's a limit to being tsundere, really. It seems she's sort of... abusive in her behaviour, and I really dislike that.
Also, proper communication please. If you never tell the person that you like him and in fact treat him harshly, what do you expect is going to happen? Why do you even think he's going to ever like you?
Let's see what happens in the next few chapters...