Didn't I mention in my comment that I understand why the author is doing this? Additionally, I did acknowledge my attachment to Miku, Kanaria, and Hinata, which should indicate that my concern isn't with the harem aspect itself. Rather, it's that I really like these three characters and would appreciate seeing them remain in focus.
From this point I want QUANTITY over Quality. This is actually BETTER than 100 girlfriendS who really x 3 like U. This is better by eight notches, and is driving the manga turbo FAST
From my understanding the person in charge is the elder sister of the blonde from the original team and wants to mess with her little sister so she's swapping the whole team round.