Cardfight!! Vanguard overDress

Half a year after Yu-yu and the others returned to their home country, Vanguard underwent a complete transformation due to the popularity of the Fighter Training App "Uniformers Program". One day, Jinki appears before Yu-yu. What is his intention?

As the head of the Minae family and the leader of Daybreak, Mirei's feelings for Haruka are complicated. On such a day, Haruka is approached by Uniformers' Shirogane, asking, "What exists in your world?" With these enigmatic words, Haruka is challenged to a fight.

Halona visits Megumi and invites her to join the Uniformers. It seems she is still concerned about Urara. In an aggressive attempt to recruit her, they engage in a fight. Megumi gradually finds herself cornered by Halona, whom Jinki calls the "chosen child of the Uniformers".

The expansion of the Uniformers shows no signs of stopping, as using the app allows Vanguard to become stronger. Upon learning that even Haruka has left Daybreak, Mirei confronts the situation alone and challenges her to a fight. Can these two ever return to how things were?

Megumi's presence disappears from Team Blackout. Worried that she may have joined the Uniformers, they urge Danji, who has returned home, to head to the Okura family. Before Danji, Megumi appears, manipulating a Masques Deck.

To counter the Uniformers, an item arrives for Raika, who has been making efforts. This item reaffirms Raika's determination. Yu-yu, Tohya, Urara, and Megumi, as well as Danji, Mirei, and Taizo, devote themselves to training with the help of their allies.

AI Gui rejects Jinki's proposal and starts to make moves beyond their expectations. If they have taken the wrong path, they must correct it. Jinki challenges Gui to a duel as his foster parent, carrying the deck used by his older brother, Shingi, the inventor.

Masanori, who has skillfully evaded Tohya's challenges, finally faces him in a destined showdown on Mt. Yama. Masanori controls the Zorga Masques Deck, while Tohya unleashes a new Bastion Deck, determined to secure victory.

Danji presents a challenge to the Uniformers. In response, AI Gui sets up a stage at the sacred ground of Kaganokuni, Hakusan, to determine the future of Vanguard. In the first match, Shirogane stands before Yu-yu, once their comrade, Zakusa.

The second match at the foot of Hakusan. Urara's opponent is Halona, whose fighting spirit is ablaze. Halona aims to defeat Urara and prove that the Uniformers are right. Urara wants to win against Halona and become friends once again. The clash of their determination and emotions ensues.

The final match at the foot of Hakusan. Sophie vs Raika, entrusted with their fateful showdown. Genius vs prodigy, witch vs nobleman, Starry Skies vs Sky Fall. The fight between these two contrasting individuals takes an unexpected turn when Sophie unleashes her full power.

The final battle at the foot of Hakusan. AI Gui, who fights Yu-yu, aims not only for a complete victory but also for the last piece of data to realize the ultimate battle that developer Shingi aspired to. And now, the true power of Gui's Dragontree Deck begins to awaken.

The overwhelming strength of Dragontree. For AI Gui, Yu-yu is merely the last fighter to analyze. He claims that the bond with the cards is just noise and that Vanguard does not require individuality. What move does Yu-yu, who surpasses Gui, make? And what will the outcome of the match be?