In order to avoid his paranoid ex, the intelligent and transparent Li Yin was unexpectedly hired by Huo Shiyue, the fourth son of the Huo family, to pretend to be his girlfriend to test his favorite school belle Lu Jingyu. Li originally just wanted to get money to complete the task and escape as soon as possible. Unexpectedly, when he first visited the house, he bumped into his ex-Huo Xiao, the second master of the Huo family, and fell into the dilemma of brotherly confrontation. Huo Xiao was broken up because he concealed his identity. He was obsessed with Li and kept disrupting the situation. On campus, Li repeatedly resolved Lu Jingsi's best friend's difficulties. Huo Shiyue gradually became attracted to each other as they got along day and night. The two brothers' pull on Li became more and more intense, and the past entanglements hidden in everyone gradually surfaced.