IT IS HIGHLY RECOMMENDED YOU READ A RAILGUN IN FAIRY TAIL UP TO THE DIABLO SAGA PART, AND A BATGIRL IN ACADEMY CITY BEFORE YOU READ THIS!! Across the Gotham City, various terrorist attacks have occurred. At each site, the Dark Knight himself has come to the strange conclusion that the fire is not ordinary, it is Dragon Fire. And to top it off, Batman can't find his friend Batgirl, who has gone missing in Academy City.. Meanwhile, in another dimension, the guild Fairy Tail has it's own problem. It's Guildmaster, Mikoto Misaka, is missing. The only trace they can find of her.. is a mysterious bat shaped blade stuck in the wall of her home.. and traces of what appears to be her blood. As always, Natsu is out to smack down whomever is responsible. Somebody is playing both sides, attempting to start a gladiator match that might rip both worlds apart, can they realize this before it's too late, and find both their reality's Misakas?

Gol D. Roger, the King of the Pirates, obtained a piece of everything the world had to offer. Before his death, his dying words would drive countless people to the seas. "You want my treasure? You can have it!! Go!! I left everything the World has to offer. " Now.. Monkey D. Luffy, a boy who ate the Gum Gum Fruit and became a rubber man, sets out to find that treasure... or.. it would be that way.. if he weren't scheduled for execution.. Instead, Mikoto Misaka, her friends in Fairy Tail and the rest of the Straw Hats whom have now joined that guild, will set out to rescue Luffy.. or die trying.. What could go wrong!?