The fact that Chiharu does not remember the name of a person whom she supposedly loved and dated is to me enough proof that she really was treating Asami as a play thing. I'd also assume that she truly was dating other girls. This wasn't someone Chiharu knew for 5 minutes or a weekend, she dated Asami outright. You don't really forget that unless you truly are going from girl to girl, you didn't really think of the other person, or you have a horrendous memory which Chiharu doesn't come off as that type of person.
I don't care for them to have gotten back together, and for Asami to come up with such a plot to get revenge spells out a story of dependence and obsession rather than a healthy romance.
last edited at May 15, 2015 12:14PM