Jeon Hyosung. Yes, that cheerful, gummy-smiled Jeon Hyosung from one of the hottest kpop band, SECRET. Secret is taking a break from promotions, and Hyosung has decided to revisit the feeling of being in school, learning with the other kids. So, she transforms into a nerd. What can possibly happen during her time there? And most importantly, would she be able to stop herself from falling deeply in love?