He's addicted, but not to you. You and Heeseung have been friends since childhood, and in high school you admitted your feelings and started dating. You really love each other very much. But at some point, when you were very busy preparing for the final exams, he found himself a strange group of friends. You began to notice that something was wrong with your boyfriend, and when you talked to him seriously, he admitted that he started using drugs, but swore that he only smoked weed. Now you're on your way home from extra classes and you can't get through to Heeseung, you're feeling genuinely anxious.