So her first name is revealed to be Azusa. Actually very clever of her to tell him only that so he doesn't have the socially safe choice of calling her by her family name. First-name basis is a sign of closeness in Japan, so she really got him squirming with this move of hers.
Hmm, new girl is kinda cute. But adding a second girl kind of ruins the tension because now he has a seemingly safe way out, instead of being forced to continue dancing in the palm of Azusa's hands. With a new girl in the equation, I think it's only fair to have Azusa's brother or maybe a new guy to make an appearance later on for more mind games to throw this hapless male lead around.
Now I think we're really diverging from the original web comic by this point, because as far as I remember there wasn't a second girl like this. I wonder just how much of this was really from the author's decision and not editor meddling?