This is a unique novel that tells the love story between college students Chen Ziyun and Zhou Yaxin, Jiang Tao and Li Li. There is another side hidden in everyone that others cannot touch. Yaxin, who is gentle and considerate on the surface, hides a puzzling "fear" in her heart; what kind of "demon" is growing in the body of the lovely and energetic Li Li? Ziyun and Jiang Tao are not healthy people. These people are apples that have been bitten by God. Can they depend on each other and move towards self-improvement?