This Drama is about a guy who suffers from severe mysophobia. He is obsessed with cleaning and even owns his own cleaning company. One day, he meets a carefree and untidy girl named Gil Oh- Sol after she enters his company as a new employee. Seon Gyul started to develope feelings for Oh Sol, he quickly realises that his mysophobia is getting better. With the help of Oh Sol, Seon Kyul decided to face his mysophobia, however, there are multiple challenges along the way..