Blue Sea is a small peninsula town with four distinct seasons and surrounded by the sea on three sides. In a small town on the peninsula, the girl Chi Yu met the most important people in her youth in the sunny summer when she was fifteen years old: the boy with unruly features and eyes as bright as the sun, the girl as bright and gentle as the bright moon... They stayed together day and night during the most confusing three years, thinking that the connection given to them by the blue ocean would never be broken.
However, when fate reaches a destined fork in the road, the lack of strict intentions becomes an excuse to cover up the trauma. They go their separate ways, as if three years have become a big dream.
Fortunately, they are destined to be the children of the blue sea. The wandering lonely ship will always look for the partners who sailed together in the past. When they can see the blue sea again, Chi Yu can finally say to them with a smile: "Long time no see."
Concept: Youth Campus, Growth and Emotions