That’s nice, how skilled enough mangakas can take a stereotypical theme, and adapt it enough to make it interesting again 
Here, Ayatsure! Sisters starts with a harem basis (a young man starts living at a house inhabited by 4 young women, he finds a magical whistle that makes them horny), but once we reach the middle, only one girl emerges victorious and a vanilla scenario is born… that was a pleasure to read!
Graphically, we were in Pon Takahanada territory. Tons of talent, a few weirdly screwed up hips, plenty of adorable shots, girls with cuteness all over… And the addition that, this time, the drawings only had light censorship that didn’t hide much (thin bars, either black and very thin, or grey and translucid): I had my fill 
I hope you’ll love this read, you too, and thanks a lot to Desudesu! 
I’ll add bonus thanks to Anony-Mouse for the info about the manga’s release, I had missed the fact it had reached completion.
By Pon Takahanada, I also share Niizuma Osenaka Nagashimasu volumes 1-2 (356 pictures), Love Gome (224 pictures), Okonomi No Mama! – As You Like It (197 pictures), An Angel’s Marshmallow Volume 1 (167 pictures) + Volume 2 (169 pictures) + Volume 3 (169 pictures), Pythagoras Bitch chapters 1-2, Blind Love Susume, Like A Rat, and a Japanese mega pack (Oneesan Hitorijime + Rabu gome + Bon Appetit Sakura + Maid In Japan + Maniac Parade + Pie Heaven).
