"If you win, win, and keep on winning, we can meet again at the venue of the National Tournament——" To fulfill the promise made with his childhood friend, a girl who had moved away, the protagonist Mitsuki Mizuhara was aiming for the National Basketball Tournament! ...But he was utterly defeated by a genius who suddenly appeared and fell into despair. He ended up quitting basketball. As the seasons passed and his emotional wounds healed, a curious boy appeared to invite Mitsuki to play basketball again. To his surprise, that boy was that very genius, Natsuakane...!?