At the cost of the gods' protection, a new era has dawned, giving the remnants of mankind a chance to rebuild. Having fulfilled their duties to Taisha, the members of Sanshu Middle School's Hero Club finally begin to enjoy their youth, living as regular students. However, such a conclusion did not come about without sacrifice. In the year 298 of the Divine Era, Mebuki Kusunoki is among the potential candidates to become the next hero. Despite her painstaking efforts to surpass her competition, she loses the position to Karin Miyoshi, leaving Mebuki furious at Taisha's decision. Two years later, Mebuki is appointed commander of the Sentinels—a group tasked to explore uncharted territory beyond the barrier. The team's seemingly simple mission is quickly disrupted by unforeseen threats, endangering the innocent lives of the fleet. To prove her worth as a hero, Mebuki vows to bring everyone back alive, no matter what it takes.

The new order of ACCA will soon hold its first-anniversary celebration. To ensure every district is prepared for the festival, Jean Otus—acting as a representative for ACCA's inspection department—is called to travel across the Kingdom of Dowa and help with the arrangements. However, he feels that in times of peace, he cannot relate to his subordinate Parrot, who believes that another betrayal against Dowa is near certain. Meanwhile, work leaves Jean no time to dedicate to his little sister Lotta and the unexpected predicament she seems to be hiding from him. Their best friend, Niino, decides to involve himself and looks for a way to support Lotta. Although Jean believes that Dowa is in no immediate danger, he must ease Parrot's suspicions before the festival and wait for Lotta to open up to him on her own.

The day Sakiko Togawa's privileged life crumbled, she painfully broke her vow to CRYCHIC and left the band behind—an act that tore her heart in two. As days fade into nights, she struggles to make ends meet until a certain cherished memory is tainted, pushing her to the edge. Driven by a fractured sense of purpose and the need to reclaim what she lost, Sakiko forms Ave Mujica, a masked symphonic metal band. Its members are bound not by a shared goal but by the fragile threads of their divergent desires. Together, they weave a haunting masquerade of loss and rebirth, captivating audiences with a gothic musical stage play. But as the girls' ideals collide, the scars of their pasts rear their ugly heads. The brittle facade the girls have built threatens to collapse beneath them, bringing Sakiko to the verge of falling apart.

Due to her mother's work, Chizuko Date has never remained in one place for long or grown attached to anything in particular. However, while temporarily staying with her grandfather Suikyou, she witnesses something extraordinary: a magical girl named Berry Blossom fighting against Chroma, member of the evil organization Fossa Magna. Seeing Berry Blossom save the day ignites a passion in Chizuko, and she swears to be a fan of the new magical girl in town thereafter. As time passes, Berry Blossom's popularity dwindles due to the incompetence of her opponent. When Chizuko randomly encounters Chroma himself, she does not hold back her complaints against him. For his part, Chroma does not enjoy being defeated again and again; moreover, Fossa Magna will force him to resign if he continues losing. In desperation, Chroma begs Chizuko to become his second-in-command and help him with his evildoings. For the sake of Berry Blossom regaining the spotlight, Chizuko must question whether it is right to join forces with the magical girl's sworn enemy.