Bang Minsoo is a fastidious young man who is afraid of germs and needs to have everything in his life in his own orderly fashion. After he giving up a dream in the States, he returns to Seoul and decides to buy a small marketing design company called TOP Industries and his childhood home. The problem is that the home has a peppy tenant, Ahn Daniel, who refuses to move out. When he arrives at his new company, the new CEO discovers that Daniel also works for his company. The happy-go-lucky Daniel just wants everything to be stable in his life, but he realizes that may be harder to maintain when his new boss starts making big changes in his workplace, including a notice stating that office romances will be prohibited. So his coworkers thought of a plan to get rid of the new rule, and that is for Daniel to seduce him.