One night of wild nightlife in her youth, she became pregnant with the CEO's child. Taking on the responsibility of being a mother, she resolutely returned home, determined to live a serious life, far away from the nightlife… "We have a new CEO coming to our company." "How could it be him?!" Years later, when they meet again, he still can't forget her. "Ha, this flirtatious woman has actually become a secretary after all these years." Overwhelmed, she secretly lets her daughter play in the office. "Do you think our company is a daycare?" The CEO's inner thoughts: How could she abandon me to have a child with another man?! I can't tolerate this!!!! Unbeknownst to him, the daughter is his own… But by now, he already has a wife…