Again, Again!

Ji-on, a university professor whose life motto is to neither stop those who come nor hold back those who leave, accidentally spent the night with one of his students. During the first class, Ji-on's voice, which had been calling out unfamiliar names one after another, came to a halt. Just as the murmuring reached the front of the podium, Ji-on snapped back to reality and parted his lips. "....Go Yi-hyun." It was the same moment his gloomy gaze shifted toward the students, as if he had just spat out words he could not bring himself to utter. "Yes." Sadly enough, Yi-hyun seemed to recognize Ji-on. "Professor. Don't you remember me?" "Have we ever met? I don't know what you're talking about. Yo...