Taecyeon and his friends, Nichkhun, Junho, Chansung, Minjun and Wooyoung are the news CEOs of the big company that their fathers built together. They succeeded of their fathers' place. They are really close to each others. They live together. They are perfect and have perfect life but the only problem is they are still single and their parents want them to be in a relationship. They all have a bad past of their relationship. But what will happen when their fathers hired their new assistants and co-workers? Are they going to open their cold heart again?