Nice game, easy enough to play and the sex scenes were good. I had no problems loading or saving.
But like others are saying, there really needs to be some progression. The reward masturbation is the SAME scene over and over- she's wearing the same outfit each time and has the disgusted look on her face afterwards. Same with the other sex scenes- it's the same over and over. After awhile, she should be offering to jerk him off and give him oral. After a month or so of the midnight masturbation, she should be letting him spend the night in her room. Maybe a skinny-dipping scene or sex in the kitchen or living room. How about him joining her in the shower or her coming to HIS bedroom for the night? Or even have a friend over for lesbian action! Your character design is good, I'd like to see another female in the game. Heck, have his mother/her sister show up- you could have 3way mother/son and sister/sister action. But PLEASE do NOT complicate the plot with more guys or extravigant subplots. For the long-term, I'd advise to eventually have a pregnancy option, most of us otaku LOVE that!
Good luck, and I will be looking for future updates!