This story takes place a little further in the future—There are now billions of card game players in the world, to an extent where card games have become a necessity, a part of our lives.The protagonist of this story, Aichi Sendo, is a timid boy in his third year of middle school. He had been living his life looking backward rather than forward, trying not to stand out. However, he had one thing that kept him going - the Blaster Blade, a card from a card game that was given to him when he was little. That card is the reason why he begins to engage in Cardfights, something that changes his life drastically. The name of the card game is Vanguard. The game takes place in a different planet called Cray. It is a place similar to our own planet, but unlike planet Earth, Gods and Demons, Dragons and other mythical creatures still roam the land. It is also a world where both Magic and Science have advanced hand in hand. Countries with advances in different fields and cultures rule over different parts of the planet Cray. And due to a never before seen play system, it becomes popular throughout the world. Aichi, immediately attracted by Vanguard, meets friends such as Misaki Togura and Kamui Katsuragi, along with other rivals. Through friendly rivalry with them, Aichi begins to enjoy a fulfilling life. Aichi, however, has a goal: to once again battle with a Vanguard Fighter by the name of Toshiki Kai. Toshiki Kai is an aloof and cold-hearted high schooler who has outstanding abilities in the world of Vanguard. He is also the reason why Aichi started playing the game. For him, Kai is the person who saved him from his boring life and introduced him to Vanguard. In order to get better at Vanguard, Aichi puts his soul into it every day. He wishes that someday, he'll be able to battle Kai and have him recognize his worth.
Team TRY3 participates in a tournament held at the United Sanctuary branch. The top three fighters will earn not only the right to be part of the branch's special selection but also the chance to fight against Team Demise. As the tournament progresses, TRY3 notices the peculiar behavior and "winning is everything" mentality of the United Sanctuary branch's fighters. In the final round, Chrono faces a familiar friend: Taiyou Asukawa, who has drastically changed from his former timid soft-spoken self. Unbeknownst to Chrono, Taiyou was subjected to a special strengthening program in which he fought against Chrono's Gear Chronicle deck in simulations, thus turning him into a cold calculating fighter. In spite of Taiyou predicting and countering Chrono's every move, Chrono turns the fight around in his favor and wins. After Taiyou is taken away by a security guard who suspiciously looks like Yuya Karasumori, TRY3 is appointed the winner of the tournament. However, the team feels that something is amiss...
During an intermission, Team TRY3 and Kamui sneak into the headquarters of the United Sanctuary branch. They are eventually caught and brought in front of Kanzaki, who reveals his true ambitions. Kanzaki has been using the branch to set up harsh regimens to train fighters who would wear special bracelets, which transfers a unique energy called "Stride Force". The gathered energy was supposed to be used to awaken the previously-mentioned miracle card, dubbed the "Depend Card", but Kouji had stolen it and escaped during the special match. After Kanzaki releases the group, Chrono is given the Depend Card by Kamui, who had received it from Kouji prior to the infiltration. With the card currently blank, Chrono regains focus on getting Taiyou back to his normal self in the upcoming final game of the special match. Elsewhere, Kouji is on the run but is confronted by Shouma. After recalling his encounter with the original owner of the Gear Chronicle deck who told him about the Depend Card, Kouji fends off Shouma and continues onward.
Surviving a devastating attack from Kouji's Genesis Dragon, Excelics Messiah, Chrono makes one last attack to win the fight. At that moment, Chrono sees a vision of a little dragon, and then Chrono's Depend Card turns into that dragon: Chrono Dran. After finally revealing his name to Chrono, Kouji tells all that he knows to him. He informs Chrono that the Depend Card allows its holder to call a unit from Planet Cray to Earth and manifest itself as that card. Kouji also reveals that there is another person like Kanzaki who already has many Depend Cards to fulfill his own ambitions: Ryuzu Myoujin, a former member of the Vanguard Association and former friend of Chrono's father, Ribe Shindou. After telling Chrono what happened to Ribe, Kouji takes his leave. In the end, Chrono discovers that it was Kouji who had been secretly giving him more Gear Chronicle cards all along.Watch Now:Amazon
Team Trinity Dragon stumbles upon a secret facility run by Wakamizu, and they challenge him. If any members of Trinity Dragon beat Wakamizu, then he will tell them his scheme. However, if Wakamizu defeats all of Trinity Dragon, then they will become guinea pigs for his experiments. Both Karl and Tsuneto lose, but Kei gathers information from their fights to finally defeat Wakamizu. As promised, he tells them that he has been using this facility to gather Stride Force to summon the last Zodiac Time Beast and open the Stride Gate. Wakamizu escapes by activating the facility's self-destruct mechanism. Team Trinity Dragon also escapes before the facility is destroyed, and the group tells Kamui what they have learned. After praising them, Kamui informs them about everything that has happened.
On the second day of the first stage, Kazuma faces Makoto Asada of Team New Nippon. While fighting, Makoto reminisces about the time when he first met Arata and how Team New Nippon was formed. Ultimately, Makoto defeats Kazuma. Just as Taiyou learns of this news, he comes across Tokoha.
Enishi cardfights Kamui, who applies an enormous amount of pressure on him. In the middle of the battle, Enishi learns that Kumi has also lost, causing him to worry even more. However, Enishi withstands Kamui's attacks and defeats him, thus allowing Tokoha and Kumi to return to the tournament.Watch Now:Amazon
The second day of the U20 first stage ends. As all the teams return to their homes, Chrono meets Team New Nippon and has dinner with them. Meanwhile, Rin decides that she is fed up with being on the team. She challenges Shion to a cardfight on top of a skyscraper; if she wins, then she will quit. At first frustrated by Shion's reasons for wanting to enter the U20 in the first place, Rin rekindles her own fighting spirit through this fight. Afterwards, Rin decides to stay with the team.
The third day of the U20 begins, where Henri gets starstruck when he faces Am Chouno. Despite the disadvantage her Granblue deck has against Henri's, Am defeats and then gives him a Rummy Labyrinth keychain. Afterwards, she, Luna, and Saya get reacquainted with Tokoha, Kumi, and Enishi.
The third day progresses with only eight teams remaining. Kazuma finds himself playing against Luna Yumizuki, who wants to make him smile through this fight. Though initially pressured by Luna, Kazuma defeats her and becomes a fan of hers. Meanwhile, Chrono loses to Nagisa, who mentions that Kamui entered the U20 because of Kouji. Chrono tries to ask Kamui about this but is unable to get an answer from him.
A sudden power outage occurs, which was caused by Onimaru and his team. Amidst the confusion, Onimaru tries to sneak his way into the field but is halted by Chrono and Kouji. Onimaru and Kouji have a cardfight with Chrono observing them. However, when the power comes back on, the fight is called off. Later, as the first stage resumes as normal, Onimaru returns to his original objective: a portal that Noa Hoshizaki of Team Nippon had accidentally stumbled upon. Inside the portal, Onimaru performs a Different World Ride, making Noa become possessed by Star-Vader, Chaos Breaker Dragon.
Near the end of the first stage's third day, Tokoha fights and defeats her rival Rin, who has always been like a wall for her. With this victory, Tokoha's team advances to the second stage, which leaves only two spots remaining.
The fourth day of the first stage ensues with Shion cardfighting Taiyou. Despite Taiyou learning about Shion's style from Chrono, Shion manages to win, thus gaining enough points for his team to advance to the second stage. Elsewhere, Chrono comes across Noa...
All eyes turn to the cardfight between Chrono and Noa; whoever wins will earn his team the last spot to the second stage. As the fight goes on, Chrono slowly realizes that Noa is not acting like his usual self and is reminded of the time when he fought Onimaru. Despite overbearing pressure from Noa, Chrono makes a comeback victory, thus allowing Team Striders to advance to the second stage.
Chrono is invited to the first Card Capital shop where he is introduced to Aichi Sendou. After Aichi gets reacquainted with his old friends, he and Kamui take Chrono back to Card Capital 2 to meet with Kouji. Along the way, Chrono gets to learn more about Aichi, who later gives him a new Gear Chronicle card that has a hefty activation cost. When the trio reaches the shop, Kouji is not present. To pass the time till he arrives, Chrono and Aichi decide to have a cardfight.
Chrono and Aichi engage in a heated cardfight. Although Chrono tries his best to fulfill the conditions of the new card he got from Aichi, he is defeated before getting the chance to use it. Later, when Kouji and Kai arrive, they intend to leave with Aichi and Kamui. Chrono wants to come along, but Kouji decides to test him to see if he is worthy enough.
To see if Chrono is strong enough for the challenges to come, Kouji cardfights him. Chrono manages to use the card given to him by Aichi, Beyond Order Dragon, to its fullest potential and defeat Kouji with it. With Chrono proving himself, he goes with Kouji and the others to see someone who knows about Team Diffrider: Nome Tatsunagi.
Chrono and the others meet and consult with Nome Tatsunagi, who tells them what has been going on. According to him, there are units who come from Planet Cray and possess fighters via a method called "Different World Ride", or "Diffride" for short. However, in the case of Onimaru and Noa, they have been possessed by evil units.
The U20 continues into its second stage. Dubbed the Castle Royale, fighters will battle each other in a five-tiered castle area. The first four teams to reach the top of the castle and have the highest amount of points will then advance to the final stage. Furthermore, unlike the first stage, once a fighter loses a match, they will be eliminated with no chance of returning into battle. As the Castle Royale goes underway, Taiyou fights and loses to Team Diffrider's Verno Farenheart.
The first day of the second stage nears its end as Chrono fights Saori. Thinking that he has this battle won, Saori is shocked when he sees Chrono render him unable to guard against his attack and make a comeback victory. Afterwards, Chrono rushes to Kazuma, who is currently fighting Onimaru.
The unit that fought together, and Kazuma. Kazumi applies for a fight to Chrono who loses something important and suffers from a feeling of helplessness. What is the future that the two hope for at the end of the fight?
The G Quest ends after 3 months, and an award ceremony is held in honor of the teams, including TRY3, that have earned the title of "Generation Master". As a grand finale, there is a special match arranged for TRY3 to face a "dream team" selected by the Vanguard Association. During the time before the match, Shion tells his teammates that Am is Ace, which makes Tokoha want to learn why she is working with Myoujin. Later, the day of the special match arrives, and TRY3's opponent is revealed to be Team Q4, consisting of Misaki, Kamui, and Kai. Behind the scenes, Kouji and his comrades begin "GIRS Crisis", a plan that will ultimately locate Myoujin.