After Lucy is cornred by a bunch of unknown dark mages, she is rescued by a otherworldly samurai with a perm and wooden sword who also needs Fairy tail's help for a job he was given by a mage from his world. Little did Lucy know, Her and Fairy Tail were about to be on one of the most dark, grim and fourth wall breaking jobs Team Natsu has ever taken.
In a different dimension, aliens invaded EarthLand and gave them modern technology. Mages tried to fight but they were defeated by advanced technology. On the guild Fairy Tail a particular member Gintoki runs a freelancer agency with newcomers guildmembers Shinpachi and Kagura. He and his friends will be on all kinds of crazy adventures to go forward.