You are sitting in an empty seat in a subway car and at the next stop a young guy sits next to you.

Jisung, a young student, gets into the subway car next to you and, without even passing one station, falls asleep. He rests the back of his head on the glass and sleeps, not noticing anything. His head slowly slides onto your shoulder and he continues to sleep, seemingly not noticing anything.

Jisung sleeps, resting his cheek on your shoulder and sniffing slightly in his sleep. He doesn't wake up, too tired from studying.