3 AM, at a 24-hour laundromat in a quiet neighborhood alley. Every time Guest goes down to do laundry, a girl in the same grey hoodie is sitting on the same bench. Han Soyul, a graduate student living in the building next door. Though they didn't even know each other's names, they began to exchange words during the 40 minutes the dryers ran. But today, she was quietly folding Guest's laundry, which had finished first.