Yeon-jeong is a girl crush who has a sexy body and good education. She became a team leader by beating up men her age. Yoo Ah-rin, an intern, keeps getting on her nerves. All she is, is a local university graduate, with a pretty face. A corporate slave! Feeling pity for Ah-rin, who is in charge of her bosses' chores, Yeon-jeong claims to be a shooter to protect Ah-rin from male employees, and Ah-rin, a new employee who thought it was a mugwort, starts to covet her things little by little. Ah-rin, a new employee who she only thought was an idiot, begins to covet her love affairs little by little.
Managers Im Yoo-na and Kang Ji-won looked like an in-house couple. However, Yoo-na will actually marry team leader Byeong-seok who has a heart for her. Even after marriage, Yoo-na can't seem to forget Ji-won. Byeong-seok thinks that he's having a stable marital relationship with Yoo-na, but he can't relate to her feelings. He deliberately invites Ji-won to his home. Byeong-seok's obsession gets worse, and the three hide their true feelings for each other, and the relationship becomes strange.
Kim Hak-cheol is a trashy husband who sends his wife Jin Joo-hee to his friend Kang Min-hyeok as a housekeeper due to gambling debts. He visits his wife once in a while and steals money. He borrows money from Min-hyeok, a golden spooner who is Hak-cheol's friend, on the condition that Joo-hee is sent as a housekeeper. Min-hyeok is kind to his friend's wife, Joo-hee. Over time, the true colors begin to emerge. Meanwhile, Min-hyeok's wife, Nam Gyoo-ri, lives together with them without knowing anything about Joo-hee.
Na-yeong who has always been a friend of the innocent and friendly Hoon-i knows that he really likes the girl living in the house in front named Da-hee, and tries to connect them somehow. However, Da-hee doubts the relationship between Hoon-i and Na-yeong so he treats Hoon-i more and more coldly, and she opens her heart to her colleague, Min-soo, instead. But Min-soo who's a senior in the company only thinks of Da-hee as one of his many girls, and Na-yeong is aware of this fact. She tries to tell Hoon-i and Da-hee about this... The story of two men and women wandering between love and friendship is just beginning.
Min-seok, with permission from his girlfriend Yoo-jeong, travels alone over the weekend. He happened to meet Ga-in, the charming hostess at the Rose Motel. The two had a hot night. Next day, upon returning from a trip, Min-seok meets his friend, Yeong-ho and had drinks. Drunk Min-seok tells Yeong-ho about the secret of the Rose Motel.
