Having not experienced the joy or lack thereof in many harem manga, I found this pretty amusing. [insert way too technical discussion of genre and archetype of the sort that usually has my wife throwing pillows and begging me to stop] I'm willing to give it another chapter or two. It isn't near the level of Monster Musume but has potential.
And for those discussing how androgynous the MC is, when I was a high-school freshman, every girl looked like that and only half had long hair. The only reason I ever wore pink was because I was mistaken for a boy so many times. That's in the US, I imagine girls in Japan are even less-developed at that age.