Kim Ahreum's world revolves around Oh Sehun her mysterious boyfriend for 3 years but when Oh Sehun called it quits between them without telling her why, she settles to just move on with her life. Comes when life plays with her, she met Byun Hanna the outgoing girl and kind hearted DJ. Sister of Byun Baekhyun the club owner who loves to keep every important person to himself. She's not ready for anything thats bound to happen to mend her broken heart.

Myoui Mina, a 22 years old girl who is struggling to live alone in the beautiful city of Seoul, South Korea, lands a job at the biggest and most renowned company in the country called, Oh Group of Companies that offers insurance and other services. She thought she could easily get in without any problem, but with the hustle and bustle, and lots of deserving and qualified applicants that deserves the spot more than she do, she was offered to take in a position that she never expected.