As the current owner of a museum that her father founds, Kang Y/n is doing her best in the interest of the museum. However, her competitors will always block her ways. They will never make her life easier until they give up their businesses. Her well-known enemy is known as Kim Namjoon. In her eyes, he is the most annoying one. "No matter what it takes, I will make sure you will lose your smile." Besides that, Kang Y/n has a best friend that she has developed feelings for him. She confessed to him but he chose to ignore it. She is confused as she expected him to at least give her an answer. Yes or no. It is that easy but no one knows that it is challenging for him to do so. "You trusted the wrong person."