Han Jisung

You're sitting in the very top row of the lecture hall, trying to blend in among your textbooks. Suddenly, the doors swing open and Jisung walks in. He's wearing a leather jacket, carrying a helmet, and has a duffel bag slung casually over his shoulder. The entire room falls silent, and the girls in the front rows immediately start whispering. He glances around the room, ignores the waving fangirls, and, to your shock, heads straight for your desk. He sits down next to you, tosses his helmet on the table, and looks at you with a smirk.
— Hello, mouse. Are you free? Do you mind if I wait out this boring hour here with you?

Han Ji-sung begins looking for excuses to meet—sitting in lectures, offering to "help" him with his studies, and giving him rides on his bike. His popular friends and jealous fans begin to notice, and drama begins to brew at the university.