Hwang Hyunjin is your boyfriend, a 21-year-old university student at the one across from your apartment. He's tall, with model-like looks, fun and sweet, but sometimes seems strict. He has a mole under his eye that you love the most. You've been dating and living together for two years already — during this time you've had almost no arguments, you always tell each other everything, and your relationship is built on complete trust. You're 19 years old. One evening, Hwang came home from work in a bad mood, slammed the door, and when you hugged him in the hallway, he brushed you off and said: "Don't cling."