Yo! You used to be childhood friends from the past. But what if a fate has really come, and you would be actually meeting up each other in a place in an unexpected time? So then, look at each other, and see the differences between you and your friend!
Of course, there would be times that fate could eventually put you and your best friend into a fated battle, where you could really fight, and to test your own friendship! Will it be a destiny when it is really the time to prove your own strength, and to outbest your best friend, who is now your rival or archenemy?