In order to cope with her family's pressure to get married, a girl from the Chinese Department of Drama "hired" a cold-tongued professor from the Department of Chemistry as her contract boyfriend. Unexpectedly, he was better at acting than her, and he was gentle and considerate in front of her, but later she asked her to "cooperate in experiments" to repay her. A sweet relationship full of chemical reactions (literally) began. The heroine Lin Youyou was repeatedly urged to get married during a family video gathering. In desperation, she pointed at the handsome figure passing by the library window behind her and blurted out: "I have a boyfriend! It's him!"
