“I am getting married soon.” "yes? Who are you with all of a sudden?” “With Han Se-yeon.” Se-yeon travels in a fit of anger after learning about her boyfriend Jun-hui's affair ahead of her marriage, and meets Ji-hyeok, the man there, at the gorgeous Rio Carnival in Brazil. Ji-hyeok appears as Se-yeon's boss after a night spent as if possessed. And a new blessing was coming! The story of a couple's marriage war that is dizzying 'pregnancy first, dating later'. The genre of life is romance comedy, confident and strong gym teacher Han Se-yeon. Usually blunt, but tyrannical on the bed, Joo Ji-hyeok, the director of the board of directors, is a pure and scheming man. A romance between the president of Yangjin High School and the PE teacher.