i beat this game and it was good and i hope this helps
1) focus on your subject because it will affect her depends on your subject. make sure you got everyone of the subject s or a.
2) once you got s and also do some task like steal, drug her that leave to ntr because giving a gift to her will quickly raise her likes and that is you.
3) once you got 500, you got to ask her out. next make sure you save the game, because there is a chance that she will stay in her dorm. if she stay in her dorm. reload the game and try again but it depends on your subject
4) to tell she stay in your dorm. go to your room and if you see a icon of a portion in your room, that means she your roommate. if you still can't tell. then wait at night, to see she here.
5) once she in your room. you can have sex with her, you can cheat her and so on. your job is to get her pregnant, just like the other male npc.
6) to get her pregnant, press the heart icon and there will be a bar next to her ass. the one you looking for is the last bar. you need to raise it up because it will increase her chance to get pregnant and also give other npc chance to get her pregnant so be careful. before trying to get her pregnant. go to the blue frog on the left. increase your cum. this will allow you to cum 9 times and give you chance to get her pregnant. once she alone and the bar is high, but you don't have to reach max. just enough to get her pregnant. now save the game and try to get her pregnant. if she not pregnant, then try again until a message said pregnant. once she pregnant with your kids. you beat the game and you go back to the main menu and that it. but if she got pregnant with somebody else, you go back to may and try again