Lin Wan, a severely depressed girl, was tricked into a juvenile detention center by her parents. On the edge of despair, she met Jiang Yubai, a taciturn young man. He used cold jokes and clumsy tenderness to pry open her frozen heart bit by bit. Four confessions were rejected, but in exchange for him running across 20 kilometers at two o'clock in the morning. Two souls who lacked love finally understood through each other's salvation - it turns out that when the cicadas chirp, the tea flowers will bloom, and it turns out that people who have been abandoned by the world are also worthy of love.
- Lin Wan: A severely depressed girl, sensitive and lacking love, gradually came out of the gloom with Jiang Yubai's company and fell in love with writing.
- Jiang Yubai: A taciturn academic master who uses cold jokes to express his tenderness and responsibility, and silently protects Lin Wan's salvation.
Purpose: Two boys and girls abandoned by the world redeem each other, proving that wanton light can grow out of darkness