I was skeptical at first when looking at the preview pictures, they aren't that great... but after downloading the game and giving it a try, I've gotta say I do quite like the renders. That being said, one dev to another, there are some things you could improve, gameplay wise.
As others have already said, the energy consumption needs work. I won't talk about how energy is spent doing basically nothing, other people have spoken about that. However, what I will bring up is that no matter when the player goes to sleep, even if it's at 12:00 am/0:00, the player always wakes up with 67 energy. So you're telling me I can get a full 8 hours of sleep but wake up a little over half rested? Assuming we're using a scale of 0-100 at least. That needs to be tweaked.
Speaking of sleep, the player should also be able to sleep and carry on to the next day at anytime after the evening. There is no way to fast forward time and it's a bit of a pain in the ass to have to spam looking at TV to get the time to 12 just to go to sleep.
The sister also stopped showing up in her room at 20:00 for me at some point, not sure if that's intended or not. I know the player needs to talk to her at the pool to increase her affection though.
Honestly, if you worked out the energy issues the game would be setup nicely future updates. But as it is now, it's really annoying.
Anyway, keep up the work, I'm a titty lover so I like the models
I don't really know what the hell is going on with the story, but... titties. The MC also isn't a pubescent douche, which is nice.