Keiwa's older sister, Sara has been kidnapped by a Knight Jyamato. Despite his injuries, Keiwa is re-motivated by Ace not to give up on saving Sara, while the latter apologize for using the former during its first round. After finding Sara's whereabouts, the four surviving Riders transforms in front of her. While Keiwa protects Sara, her hand accidentally touches her brother's Tycoon ID Core, revealing an unexplained terrifying past that Keiwa did not know about.

As Ace becomes a Desire Deity once more, he suddenly calls Tsumuri "older sister", who considers Ace's world "unacceptable". He and Michinaga return for the new DGP tournament, along with Neon after she unexpectedly received permission from her father Kōsei. The three soon learn that they have been joined a mysterious guitarist named Win Hareruya, who reveals himself as the true identity of Punk Jack. Concurrently, Giroli is secretly revealed to be the DGP's masked game master as he privately entrusts Hareruya with important tasks.