Jiang Bai takes on the task of looking after his best friend's niece. He thinks he'll be stuck babysitting a little troublemaker, but little does he know he's actually getting a max-level professional helper! To secure a long-term supply of delicious meals, the adorable little girl takes Jiang Bai's phone and launches an all-out campaign to win over her icy aunt. Until one day, Jiang Bai is summoned alone to the office of the terrifying female CEO, the woman everyone at the company fears, simply because he stepped through the entrance with his left foot first. Jiang Bai thinks he's about to get fired, but the female CEO gives him a cold smile and says, 'Come with me to register our marriage. Right now!'