Su Yichen is the kept substitute lover of the Big Boss, Gu Hanzhou, taking the place of the Boss' White Moonlight, Pei Suyue. Everyone thought that Su Yichen's love was selfless and humble, unaware that it was all due to his superb acting skills and that the Boss was merely just his ATM.

In an unexpected turn of events, the White Moonlight returned to the country earlier than expected and even stayed at the Big Boss' house.

The very first day he moved in, the White Moonlight said to the Substitute: "Susu, Leave Gu Hanzhou and come with me!"

*White Moonlight - A person you long for but cannot have; unforgettable first love