Jiang Yan, a college student who grew up in an orphanage, was unexpectedly hired as her boyfriend by a rich girl Zhou Qiao with a monthly salary of 200,000 yuan, just to piss off her weird ex. Jiang Yan abides by "male virtues", becomes a caring and exclusive boyfriend, and manages this money-transaction love to perfection. As they get along, the two have many misunderstandings but gradually develop feelings for each other. Zhou Qiao's past and Jiang Yan's delicacy make the bond that began with interests slowly become sweeter. When the balance of wealth reversed, Jiang Yan counterattacked and became a rich man. The love that began with a transaction ended in the sincerity of each other, from a contract to staying together for the rest of his life.