Great renders, good lightning, good composition, the slow burn towards a greater Harem or conflict...free-for-all mayhem between the various girls, is kinda exciting. What is not, is the character modelling, as they are WAY too flawless, to the point that it's hard to distinguish the various girls.
They all have the same smile, not a single freckle anywhere, all smooth skin. The one who sticks out a little bit is Sara, who is a bit pale, but in the wrong light that doesn't help.
Now redoing the character models, with a bit of a difference, is not that hard, the program used to render, can most likely apply morphs, and the same technology that applies tattoos, can be used to give someone a bit of facial character.
But redoing every single render after changing the models, is likely not viable. Just a thing to think about for the next game you make. Keep up the good work!