I was actually Wondering how they would pair up Kurumi and Hahari and give them some unique dynamic since we always see pairings of girls in the covers with their own unique dynamic, Karane x Hakari, Nano x Shizuka, and now we got Hahari x Kurumi.
Also these ground rules that they have of not wanting to get ahead of any of the girls on making the moves to Rentarou. its really amusing and kind of curious how its such a taboo and Im really looking forward how Rentarou would start to move his relationship with them to the next stage instead of staying in this familial sense of unity they have.