Naeun is a kind girl who always thinks positive about other people. She is so positive that she is clueless and easily believes people. Since she graduated to high school, she meets Hayoung and Chorong. They became friends since then. Unfortunately, her best friend, Hayoung turns out to be a liar. No one realize it except L, who has been secretly watching Naeun. He fell for her since he first saw her. Coincidently, his best friend Woohyun is in a relationship with Hayoung. How will L approach