That day, that night, that man: "There's no marriage in this life!" Jang Hui Won, the youngest manager at a liquor company, says beer is everything. Betrayed by her long-held unrequited love, she feels helpless and reeling. Then, she meets a strange yet charming man and spends an impulsive one-night stand with him....

"She's the first person who's ever put me to such a deep sleep!" Du Jun then discovers the woman he's been searching for is pregnant. After a fleeting moment of shock, he begins to pursue her unconditionally. Meanwhile, Hui Won, who has been desperately pushing Du Jun away...

That night, that man is our company's president?! Hui Won flatly rejects Du Jun's confession, which isn't really a confession. Du Jun is uncomfortable with Hui Won's brashness. Meanwhile, the recipe for a new product that Hui Won was developing is leaked to a competitor, and Hui Won is accused of being an internal spy...

Ugh! Hui Won's morning sickness has begun! Thanks to Du Jun and Se Hyeon's fantastic collaboration, Hui Won barely escapes the threat of her colleagues discovering her pregnancy. However, with the untimely tears streaming down her face and a loss of appetite, she struggles with morning sickness everyday. But Hui Won...