In the summer when he was eighteen years old, Xie Shiyu met Gu Tinghai who came to sketch in an old bookstore in a small coastal town. Before leaving, he said: "Next time we meet, let's go see the sea." But that "next time" was seven years late. When she saw him again on the northern winter beach, the painting on the canvas turned out to be her eighteen-year-old appearance. It turns out that he has been looking for her for a long time, and it turns out that he always remembers going to see the sea every time they meet.
Purpose: Some promises are worth a lifetime to keep.