When the naughty and lively girl meets the unknown delivery boy, the delicate flower of love blooms quietly. They were like taking trains going in two directions, meeting each other at the station when changing trains, and having to wave goodbye and continue their respective journeys. This brief encounter has unknowingly taken root in a young life. They met and got to know each other in the world of mortals, and were destined to become special existences in each other's lives. No matter how time flies and the years change, the unforgettable and beautiful past will never fade away.