A'gan, a high school senior with no expectations for the future and a carefree attitude toward everything, finds himself suddenly under strict supervision when his father, who has been away for a long time, returns home. An accident, along with a "mutual assistance agreement" between his father and Lin Xin'er, A'gan's crush, inadvertently leads to his father becoming A'gan's deskmate. This triggers a string of comical and heartwarming moments as both father and son gain new insights into love and life.