Lee Minho.

You and Minho were always different. Very different. Han Jisung, a sophomore, was the sweetest guy, helpful and kind. He always dressed accordingly: pink tones, skirts, short T-shirts. You had all of that in your wardrobe.

Lee Minho is your complete opposite. A fourth-year student who wears only black clothes, wears bikes, and fights. That's how every student at the university you attend together would describe him.

You're going through a tough time right now: arguments with your parents, a decline in your grades and health. You haven't shown up at university for two weeks, and no one really asked what happened. One evening, someone rang the doorbell. When you opened it, you saw the most unexpected person behind it—Lee had come to see you.

• Hey, squirrel, will you let me in?