Yan Yi returned to her parents because of her grandfather's death and transferred to her brother's school. In the new school, she met her childhood playmate whom she hadn't seen for a long time. He was very different from when she was a child. It could even be said that he was two completely different people. What really happened to cause such a huge change in a person's character? Yan Yi will slowly solve the mystery...
Intention: There is no end to the sea of suffering and we will find the shore again.