Reading these chapters give me a smile on my face but I could help but think these could have been like 5 different single couple mangas. Harem just inevitably leads to unsatisfying conclusions where no one gets picked or everyone gets picked with superficial relationship developments.
Not gonna say that never happens, I may not have read what you've read, but every harem I can think of off the top of my head (Starting with the one that spawned them all, Love Hina, up to the latest yuri harem I've seen concluded, Tachibana To Lie Angle) has a main pairing that is pretty obviously the "real" pairing throughout, or at most has two close rivals that carry all the tension. The only one I can even think of that was ever dubious about the main ending up with anybody was Negima!, where the protagonist is literally a child and isn't thinking about this stuff yet and also the story isn't about the harem or romance in any way. (Negima was an intentional subversion of the harem concept to begin with)
Main reason being that while it's pretty understandable for a person to be torn between two romantic interests, more than that is liable to come across pretty wishy-washy and scummy.
This one seems a little different, in that is isn't playing favorites yet, but as a result it kind of has this feeling like all we've met so far is the peanut gallery, and the real, final girlfriend is still out there somewhere, waiting to decend. Her high school crush seems like an obvious choice, but maybe that's too obvious.