During his student days, Gu Fan fell in love with Mu Wanxia at first sight. To support her ideals, he gave up his own personal development and entered her company to work as her secretary. After an accidental drunken night, the two became entangled. Mu Wanxia intended to offer compensation, but Gu Fan mustered the courage to fight for a chance to date. For the next four years, he held the dual identity of secretary and secret partner. When Mu Wanxia's first love, Lu Qingyu, returned to the country, Gu Fan saw clearly that her heart always favored others and realized his long-term dedication had never been cherished. He chose to resign and exit, deeply cultivating the AI field to carve out a successful career. Mu Wanxia had long grown accustomed to Gu Fan's long-term companionship, but until she lost him completely did she suddenly awaken, leaving behind only a heart full of regret.