On his way home, he encounters Ha-jin with blood on his mouth and clothes, and he runs away in surprise, but he is caught. At the moment of crisis, Ha-jin escapes thanks to a cat that suddenly appears, and Do-kyung is released safely. The next day, Do Kyung, who was distraught about what happened the day before at school, accidentally runs into Ha Jin again. In the end, Do-kyung, who was caught by Ha-jin and revealed his name and half, returns to his dormitory trembling with anxiety. But what is this? The dormitory roommate has been replaced by Ha Jin?!