Interesting premise. Unfortunately it's ruined right off the bat by being GL and doesn't even have any graphic sex, or even just nudity in the first chapter. Worthless.
100 Girlfriends? Kinda. The first two girlfriends (Karane and Hakari) are genuinely very into each other. There are various genuine good relationships between some of the other girls that sometimes verge on yuri.
Also... Hakari's mom is super horny for all of them.