Han Soo-Jin had never been particularly popular, and although she'd suffered at the hands of bullies throughout her school years, she'd managed to make it through with the help of her best friend, Kim Jae-Sung. When her only friend moves away just high school is about to begin, however, her strength fades and life seems to go downhill fast. Whilst most of her classmates choose to ignore her, a particular group decide she's the perfect target to tease and torture for seemingly no particular reason. Their favourite prank becomes placing love notes in Soo-Jin's locker which leads her to believe she has a secret admirer, though this backfires when the quiet and mysterious Kim Dae-Hyun steps forward and takes ownership of the notes, confusing everyone... especially Soo-Jin. How could a guy she'd barely ever spoken to have feelings for her? Little does she know, an impromptu trip to the library to study sends her into the arms of the charming Cho Ji-Hun, and spiralling into a story of secrets, lies, trust, betrayal, and most importantly... love.