Kiryong Yang is an ordinary high school boy who has a classmate named Jae-Kyung Yoo, who is somewhat clumsy and clueless. Both have a very good friendship, but without any kind of love attraction. Until one day, by chance, Kiryong discovered the deepest secret of his friend and because of this his heart began to beat, will it be beats of fear or love? (Source: Lezhin Entertainment, translated)