A skilled Tactician finds his way to the world renounced Super Smash Brothers: Team Tournament championship, aiming for nothing more than to win, but when he arrives to the scene, there is only one problem: he does not have a partner to fight alongside him. Without a choice, he is paired up with a mysterious man, one he's met before only once before - in combat. With very little trust, Robin begrudgingly accepts this man as his teammate, but it's going to take more than simple toleration for them to come out on top.