My brother couldn't be a corrupted magical girl.

In this quirky and humorous web novel, the protagonist's younger sister is bewildered by her brother's fascination with magical girl comics and his hidden stash of rare, priceless magical girl dresses. However, when her older brother unexpectedly transforms into a villainous magical girl and appears on the battlefield, she is left stunned and perplexed. As the story unfolds, the sister is forced to confront the mysterious and transformative world of magical girls, and the unexpected revelation of her brother's true nature sparks a journey of self-discovery and unexpected adventure.