- **Reunion in Dislocation of Time and Space**: Cultural relic restorer Lin You accidentally traveled through time and space and became a senior high school girl while restoring an ancient painting. He discovered that the boy in the painting had the same appearance as his deskmate Shen Tingbai, and the red mole on his wrist became a bond across time and space.
- **Campus with surging undercurrents**: Being a transfer student brings a crisis of exclusion, and Shen Tingbai protects it in a silent way. From breakfast at the desk to holding an umbrella on a rainy night, secret love is hidden in every detail.
- **Puzzle of memory fragments**: the gentle whispers in the infirmary when he was sleepy, the old sketches in the secret passage of the studio, and the obsession of the person in the painting three hundred years ago that spanned time and space gradually emerged.
- **Two-way Redemption**: The accident of the cultural festival stage play became an emotional catalyst. Shen Tingbai's feelings that had been suppressed for many years and Lin You's throbbing heartbeat intertwined into a red thread of fate among the falling locust flowers of the ancient locust tree.
