Park Bogum-- well-liked, kind to everyone, and fashionable. Lee Jae Eun-- the "Little Sister" who is shy and cheerful. Both are part of the same Drama Club, but one's an actor, the other's a backseat writer.  One day, Jae Eun catches Bogum slipping up. Perhaps he is not the Mr. Nice Guy everyone knows him to be? Her observation leads to an unexpected friendship between the two.  This is a story about their friendship. A first crush. Fitting in. School Life. Family.