Hello, i'm having trouble finding a japanese game with a male protagonist that is still in school. The game is centered around getting closer to his girlfriend who is also in school. You have the option to work during the day so that you can buy items and go on dates with the girlfriend on the weekend. She starts out reserved and slowly loosens up as you increase her affection/love and lust bars. The girlfriend also has a younger sister that blackmails you at one point. The young sister start out not liking you either. Also this game looks more on the realistic side of game. something like Umemaro 3d but schoolers. Sorry for not giving much information but if you have questions please ask. I'll try my best to answer.