Shen Anruo (who has been with her former boyfriend Fang Chu for six years) and Xiaoya (who has a crush on Han Yi) from the Chinese Department of T University in D City, and He Chao (her boyfriend Ji Lan) from the Physical Education Department live in the same dormitory. They are best friends.
Fang Chu broke up with Shen Anruo due to various pressures and dated Ye Jie. Shen Anruo's cousin He Yinuo also fell in love with Ye Jie.
There were rumors in the school that Ji Lan was being fostered. Shen Anruo deliberately hid He Chao's knowledge and dissuaded Ji Lan from ending the foster care. And He Chao discovered that Ji Lan was being kept by her father's mistress, so she decided to carry out a secret revenge plan.
Concept: How good friends become strangers