For anyone who is arguing that Miku is manipulative but for a "good" reason, I don't know what have you been through but I give you my best wishes. Do not normalize this kind of behavior. I would understand this argument if Miku was doing this unintentionally, but then it wouldn't be called manipulative anymore.
Miku is blatantly contradicting her own words of "I love you Kyoko" by getting clingy to random girl 1. This is one step away from "I slept with another girl just so that you will become jealous and pursue me", and honestly, I can see this happening with the character settings of Miku. For someone who haven't settled on their feelings yet, this move is such a double edge sword. I would think anyone with dignity would just walk away because they realize how unserious and manipulative the other person is. I know I would.
Why, this shit is just the cake analogy she was trying to push before, and because that shit worked on Kyoko (since she bought the cake at the end), Miku is trying it again.
This pattern of manipulation is only going to continue even if they get into a relationship, because as a human, Miku will always have new needs and wants and she will not hesitate to manipulate Kyoko into complying.
Not every kind of love deserve to be labeled as positive and supported. If the opposite were true, then stalkers would not be as hated as they are (just an example). This is straight up obsessive and toxic behavior.