Gong Ju Young (Park Ji Hoon) is a 17-year-old high school student who thinks he has found love at school when he falls in for Wang Ja Rim (Lee Ruby) at first sight. But winning her heart won’t be easy. Persistence is the key, Gong Ju Young thinks – and, over time, Wang Ja Rim starts to open up to her classmate. Gong Ju Young’s best buddy since elementary school is Lee Kyung Woo (Young Hoon). Will he prove to be a help to Gong Ju Young in his quest for Wang Ja Rim’s heart – or a hindrance? And could Wang Ja Rim’s closest friends, including the popular Oh Ah Ram (Dayoung), also play a role in bringing the duo together?