You know, the scumbag Makino does not even understand that her parents are very lenient. All they want is for Makino not to fail any subjects. 60%? Even if you do not go to cram school, you still should get the minimal passing grade if you pay attention to the classes. Her parents just want her to get at least a D. You cannot go lower than that when it comes to expectation. Also, she cannot even think of any career for the future. Even "Night Club owner" is better than " ? ?*. How hard is it to make up a career choice which you have no intention to go after? Take the money, and then IF you reach University, you can change your major from that subject to something easy. Consider how lenient the parents are, they are unlikely to watch over Makino all the time. It is also has something to do with saving face. A cram school owner's daughter should be able to go to College, you just do not need to tell which College she went to, along with the major.
If you cannot get into the top universities, just make sure you pick one that is not too far away from home but also not too close to home. Then you can make up of excuses like "I want to stay with my parents on their sides, just in case they need me", "My sister has her own life, so I have to be close to home to help out my parents and look after them", or "I cannot handle the crazy every day life in a big city like Tokyo. I prefer studying somewhere that is less hectic in life while also has a "Put in her choice" department".
What a piece of scumbag.