Final Fantasy: Unlimited

Yuya Sakaki's dream is to follow in his father's footsteps and become the greatest "duel-tainer" in history - and he just might pull it off when he suddenly discovers Pendulum Summoning, a never-before-seen technique that lets him summon many monsters at once!

When aspiring duelist Yuma meets Astral, a mysterious visitor from another universe, it seems like destiny. Yuma needs Astral to teach him how to duel, and Astral needs Yuma to help him regain his memories!

In ancient times, a great battle was waged between a master mage, Enno, and an evil demon goddess, Karuma. Enno didn't have the strength to defeat her alone and was forced to call upon Zenki, a powerful protector demon. After Karuma was defeated, Enno sealed Zenki away in a pillar located inside his temple. 1,200 years after this epic battle, Enno's descendant, Chiaki, unleashes her family's powers to summon Zenki.

Den City is a city with advanced network systems in which a VR space called LINK VRAINS was created by SOL Technologies. The Knights of Hanoi, a group that hacks through dueling, as well as SOL Technologies are seeking a mysterious AI program. Yusaku Fujiki, also known as Playmaker, is a first year high school student who manages to capture this AI program while trying to find out the truth about an incident in the past.