Jiang Jiaojiao fell from a cliff and woke up as Jiang Jiaojiao, a top student. She soon discovered that there was another person living in this body - seventeen-year-old Xiao Jiao'er. They have the same appearance and similar names, but they can never meet each other. They can only take turns controlling their bodies and leaving messages and conversations in their notebooks.
One is a rebellious "traveler", and the other is a gentle and quiet top student. They share secrets with the same pen, hide a candy in each other's pocket, prepare breakfast for each other, and fall in love across time in the middle of the night. When everyone says this is a disease, when the diagnosis requires that one of them must disappear——
She wrote her last letter: "Xiao Jiao'er, after the college entrance examination is over, let's go see the Aurora."
Two souls, one body. A love song in the mirror that begins on a cliff and ends with a heartbeat.
