(MATURE CONTENT!! THIS HAS A SLIGHT LIME AND A VERY OBVIOUS LEMON SEX SCENE) Yoon Bum has had his eye on a girl at his university for months. One day, they run into each other under unexpected circumstances at the subway. When she drops her bag in a hurry for her train, she accidentally leaves her back up bra behind. Yoon Bum now with her bra, he is forced to track down his crush and return it to her without her thinking he's a total pervert. Will he succeed? Will the girl who barely knows his name acknowledge him finally?