To protect the boxing gym left by her master, Su Wan makes an agreement with Lu Jinyan, the heir of the Lu family who has an injured leg and has temporarily stepped away from his career, and the two live together as a married couple. During their time together, her cheerful personality accompanies him out of the low point in his life, and he rediscovers the direction of his life. Facing various twists and turns in the family together, from initial contract partners to gradually getting closer to each other, they also unravel an old incident from many years ago. Acting out a fake relationship turns it real, first marriage then love, and in each other's company, they achieve mutual growth and true love.