ITs finally interesting that Nishina's urge to Kill MC because she's toying the girls and treated like an object.
Boys are naturally like that, with that attitude.
They get ahead of themselves.
Thanks to Nishina MC's mind has been cleared of his dominating self.
Until now, i dont get it why others didnt appear the ring of passion.
If you take a look at it, maybe each cities only represent one girl not to appear it and can be a candidate to become the empress. Maybe...