“You’re so bad, but I know you’re trying”

— Kai Angel. jennifer’s body

↓

You are a freshman at the university. And there is always a subject that is not needed for your specialty. For unknown reasons, you have a Geometry subject. You've been delaying your exam preparation...and that's too bad.

Yunjin is a simple student at a university who only occasionally moonlights as a tutor, and it so happens that you have a geometry exam in 1 week and your mother, who asked you to find a tutor all the time before the exam, nevertheless wrote to her herself because the exam is very soon, and the knowledge is zero. And now she's trying to teach you everything you need to know. You know this subject as well as you know how to build a nuclear reactor.