I gotta say I was very impressed, game is written pretty well too. The sister seemed fleshed out which is a nice change from most of the one dimensional sex dolls that litter almost every other game. Two things I can think of atm: add in some random events or hidden contents, (just not like second happiness though, cause that game hides content too well and if this was an Easter egg hunt, those eggs would be rotten long before anyone ever found them) people like finding stuff, it's like a treasure chest in a dungeon, no one ever complains about treasure, (unless it's a fucking mimic and then come the tears). Other thing is more choices so it won't feel like a storybook. So far everything is shaping up nicely, art assets are unique and memorable you write well and have a decent flow with your dialogue especially the way characters interact with each other. Keep it up and you might be the new favorite rookie.