Parallel Heartbeat

He was standing at the boarding gate, holding in his hand the faded couple's outfit that she had thrown into the trash can and picked up again. When the broadcast urged boarding, he turned around and saw her holding the same faded piece of clothing, standing outside the floor-to-ceiling window, writing on the glass with lipstick: "Forgive me for hearing my heartbeat but not being able to say goodbye." He smiled, folded the two pieces of clothing together and stuffed them into his backpack, and finally boarded the plane. Three years later, she received an anonymous package containing two washed couples' outfits with a note: "This time, it's me who says goodbye first."