Practicing Dragon Slaying Magic for Ten Years, Participating in the War on Top

Travel through an island called Sirius in the world of pirates!
The unknown Qi Yu is bound to the Dragon King system!
Start Awakening Fire Dragon Slayer Magic!
Contacting the name of the island, Qi Yu made a judgment that it is very likely that this is Sirius Island in the Fairy Tail World!
In order not to be instantly killed by the Black Dragon King Akunologia, Qi Yu chose to practice life!
until one day in ten years.
An oriental blue dragon descended from the sky, claiming to be the Four Emperors and Hundred Beasts Kaido!
At this moment, Qi Yu realized!