"Bubblegum Crash" is a three-episode OVA series set in the same universe as "Bubblegum Crisis," taking place in the futuristic city of Mega-Tokyo. The story unfolds in a world where advanced technology and humanoid robots, known as Boomers, coexist with humans. The series centers on the Knight Sabers, an all-female vigilante group composed of Sylia Stingray, Priss Asagiri, Linna Yamazaki, and Nene Romanova. These women operate outside the law, using high-tech powered suits to combat rogue Boomers and corporate corruption.

The narrative begins with the Knight Sabers disbanded, as Sylia has temporarily stepped away from leading the group. Priss, now working as a rock singer, and Linna, employed at a fitness club, continue their lives independently. Nene, still working for the AD Police, struggles with the moral complexities of her dual roles. The fragile peace is disrupted when a new wave of Boomer-related crimes emerges, orchestrated by a shadowy organization seeking to destabilize Mega-Tokyo. The Knight Sabers are drawn back together to confront this threat, despite their personal differences and the challenges of reintegrating as a team.

The first episode introduces a series of Boomer rampages linked to a mysterious hacker group. The Knight Sabers intervene, uncovering a plot involving a powerful corporation exploiting Boomers for illicit purposes. The second episode delves into the personal struggles of the team members, particularly Priss, who faces a moral dilemma when a former lover becomes entangled in the criminal underworld. The final episode escalates the conflict as the Knight Sabers confront the mastermind behind the Boomer attacks, revealing a conspiracy that threatens the entire city.

Throughout the series, themes of identity, loyalty, and the ethical implications of advanced technology are explored. The Knight Sabers must navigate their fractured relationships while battling external threats, highlighting the tension between their personal lives and their responsibilities as vigilantes. The OVA maintains a focus on action and character development, with each episode advancing the overarching plot while providing insight into the motivations and challenges faced by the protagonists. The series concludes with the Knight Sabers reaffirming their commitment to protecting Mega-Tokyo, setting the stage for future conflicts in their ongoing struggle against corruption and technological misuse.