In order to prevent others from hurting her, she hides herself in a gentle appearance, and her emotions and sorrows seem to be invisible on her face. She is gentle and is the most beloved school girl of every senior and senior sister. He is a ruthless person who has nothing to do with anything and has no reaction. While studying He was her senior in her life, but he never "cared" about this school girl. She had no choice but to hide the secret in her heart forever. He pretended not to notice her concern for him. Now, before she became popular, her best friends broke out. In school, they are still their seniors. But they were rude to them at home. They danced upstairs every day, and they who lived downstairs came upstairs to protest, killing them (I won't tell you yet). A few years later, he took over from his father and became the unattainable CEO. But they did not know it , entered his company one by one. As time went by, her love for him remained unchanged. She only responded to his words and became his good wife, which brought herself the source of sadness. The appearance of a third party put their marriage in a desperate situation. Can they reunite after breaking up?