Strange and distorting social relations drama

The drama is enjoyable and you can say that it draws you in, but the concept itself is strange. The main character is literally obsessed with her boyfriend and acts like a creep. The very fact that she is rejected for such a long period of time and still follows him, literally follows him, is abnormal. The only explainable aspect (because the character and attitude towards the main character is terrible) is the appearance of the main character XD. Even for a drama about teenagers and later students, it is very childish.