This manga is dumb with misleading tags. This us not harem, nor romances. It's more like Yuri/Shoujo ai and Friendships. I don't understand why it's a harem when most of all the supposed 'harem' candidate only interact with the FMC the most while the MMC ignored and treated like a mob. Should delete the MMC if author want a better story. It just too forced that author trying to push 'harem' thing when it doesn't even happen at all. The romance are super cringy and FMC don't need it for character development.
Edit: For someone who looking for 'harem' in this manga, forget it. It's obvious the first girl the one who will be the FMC , in fact she is the only heroine there judging by the interaction with the MMC and her screen time. It's a fake harem but worser than Nisekoi...