The film revolves around the mostly dependable Toraji and free-spirited Haiji, two siblings who suddenly become President and Executive Director of Armadillo, Inc. when their father, Kintaro Koinobori, suddenly steps down from his position and appoints his sons in his stead. With the help of their father, the two brothers continue to keep Armadillo Inc. at the top of the heap, yet slowly, but surely the relationship among all three begins to deteriorate. Through trials and tribulations, the two slowly begin to learn the true meaning of family. Will the family hold together? Will they pull through? The answer may lie in a song the boys are composing.