Lin Huan, who just entered high school, fell in love with her physical education teacher Su Muyu because of a dream. Su Muyu also slowly fell into it, but there was a taboo red line between teachers and students. Su Muyu wanted to get the two back on track, so she fell in love with Wang Yi, an art teacher at the same school. Although Lin Huan was hit, he couldn't control his heart, and the secret love was deeply rooted in his heart. The two ate together in the cafeteria, walked on the playground, and Su Muyu took Wang Yi to physical education class and asked Lin Huan to play badminton with her. Lin Huan could not hold back the sourness in her heart. Until one day, Lin Huan discovered that they were living together. She broke down holding her best friend in the stairwell of the teaching building and cried, "I had to give up, but I really couldn't let it go. I like him so much." A series of things happened later, and the two met again. Su Muyu finally fell on Lin Huan. The red line was not only the taboo red line between teachers and students, but also the red line of Yue Lao.
Intention: secret love