The second season of the mini series starring the girls of BanG Dream!

Qiang Niang mainly tells of the protagonist Carrie, who has lost her combat memories, searching for herself and the story of her final "Awakening". In the years between 2025 to 2030, a world war involving the entire world has resulted in the demise of half the world's population, and humanity has already lost control of the direction the war shall go in. In order to seize ultimate victory, war has gradually been turned into a battle without people, similar to a game. War has already become about Satellite lasers, Bomb drones, Intelligent AI, a battlefield between unmanned gun turrets and tanks... Then, there are also a group of young maidens who uses outdated firearms to engage in battle —— the Gun Girls.

Continuation of Teppei's journey with B't X to rescue his brother Kotaro Takamiya from the Machine Empire. The OAV series picks off from the TV series from the point where Hokuto successfully saves both Teppei and B't X and makes B't X far more powerful than before. (Source: ANN)

Teppei is going to visit his older brother Kotaro Takamiya during a scientific conference after training with a mysterious woman named Karen for the past 11 years. However his plans for a family reunion become stalled when a woman named Aramis kills everyone in the conference to kidnap Kotaro. Teppei on the way to save his brother encounters a broken mechanical horse called B't X who revives thanks to Teppei's blood and is now his aide to save his brother from the mysterious Machine Empire.