Nam Dahee, a senior at BWCW Academy, aces every subject at school except for the most important one…boys! She is utterly hopeless when it comes to matters involving the opposite – a huge problem since she’s crushing hard on Kim Jongin, one of the most popular boys at school. But one day every thing changes when one of Jongin’s best friends, a certain Oh Sehun, finds out about Dahee’s crush. And unthinkable happens. Instead of blabbing about her feelings he offers to become her love coach. With his expert teachings will Dahee become the apple of Jongin’s eye…or will something even more unexpected happen along the way?