Mana-chan Gakari: Seijin Muke Soushuuhen

Mana is a quiet high school girl who endures relentless bullying from a male classmate. Each day, the harassment grows more severe, leaving her feeling trapped and powerless. She withdraws from friends and family, unable to see a way out. One afternoon, while cleaning the school storage room, she stumbles upon a mysterious device that grants her the ability to transform into a powerful heroine. The transformation offers her a chance to fight back against injustice.

Now, Mana must navigate a double life. By day, she remains the timid victim, hiding her bruises. By night, she becomes a masked protector, using her newfound strength to confront not only her tormentor but also other threats. However, the line between justice and revenge begins to blur as she struggles with darker impulses. Her bully, unaware of her secret identity, continues his cruelty, pushing her toward a breaking point. As she uncovers the device's origins, she must decide whether to use her powers for vengeance or to protect others.