A romance comedy that portrays the complicated feelings of a couple that breaks up saying, “It was an awful time with you, and let’s never meet again!” However, the documentary they filmed 10 years ago in high school suddenly gains popularity, and they’re forcibly brought together in front of the camera once more. Choi Woong who appears to be an immature free spirit, but he brings out his sincerity when he finds something he wants in life for the first time. Gook Yeon Soo whose greatest life goal was to place No. 1 during her school days. Now, she’s trying to become an adult while living life fiercely and adjusting to reality with a wound in her heart. Kim Ji Woong is a documentary director who lives his life as an observer. Kim Ji Woong is a lonely figure who thinks that a documentary director who observes the world behind the camera somehow resembles him. He has maintained an omniscient perspective for most of his life but will start to change when he makes a documentary about Choi Woong and Gook Yeon Soo. Top idol NJ is a famous celebrity with beautiful looks and amazing skills. After working fiercely as a star, she realizes that she is slowly becoming normal again and prepares to live her real life. She becomes interested in Choi Woong’s works and naturally grows curious about him.