Y/N has a secret. Each week, she posts a smutty webcomic inspired by her longtime crush, Heeseung. But she can never let him find out. Because her and her best friend, Sohyun, have a pact. Neither is to do anything about their crush on him in order to stay friends. After an altercation at karaoke with Sohyun's brother, Sunghoon, he ends up with her phone. And now he has read the comic and she has to figure out a way to keep him from spilling. Lucky for her, he has some ideas.