Several days after the mortal battle against Link Joker which embroils the whole world, the world has returned to peace. 
But Kai Toshiki faces a surprising situation. Sendou Aichi, the hero who saved the world from the invasion of Link Joker, has suddenly disappeared. In addition, everyone's memory about Aichi is lost...Almost all hints have been lost, and Kai starts to search Aichi with "Blaster Blade" and the deck of Royal Paladin, the only existing hint and the proof of their bonds. 
Kai is approached by fighters who call themselves "Quatre Knights". The four---Gaillard, Neve, Ratie and Sarah---are fighters with world-class power in vanguard fights. They control mysterious power and urge Kai to give up searching Aichi. What is their purpose...!? And what is their relationship with Aichi...!? 
Kai, with the new power "Legion" in his hand, fights to take Aichi back. Now, the war has begun! 
 
(Source: Cardfight!! Vanguard Wikia)

__Nickname:__ Hamaa (ハマー)
__Height:__ 177 cm
__Skills & Hobbies:__ basketball, video & mobile games

A major event known as "G Quest" is to be organized by the Federation of International Vanguard Associations (FIVA) this autumn. Those who conquer six Branch Quests will be honored the title "Generation Master" as well as the chance to become a Clan Leader. While members of TRY3 are all excited by new goals ahead, a massive conspiracy that would lead to the destruction of Vanguard has been secretly set in motion. 

(Source: Anime News Network)

A new manga announced commemorating the 10th anniversary of the Cardfight!! Vanguard franchise. Written by Itou Akira and drawn by Kageyama Naoyuki. It started serialization in Monthly Bushiroad from the 84th issue.

The story features 20 year old Toshiki Kai during his time in the European League along with Olivier Gaillard and Philippe Neve.