Nanako Tatano, a company worker who dies from overwork, awakens in a fantasy world that looks exactly like her beloved anime "Queen's Blade Legends." Reborn as a nameless NPC-like character, she now goes by the name Nanashi. In this world, fierce and voluptuous female warriors known as Battle Queens (Bitoushi) clash using divine abilities called God-Seals. By a twist of fate, Nanashi accidentally releases a legendary monster—and gains the overpowered skill “Shapeshifting Right Arm.” With this god-tier ability, she could dominate the battlefield… but instead: "Dueling? No thanks. I’m just here to watch my favorite girls fight up close." As brutal duels decide everything in this world of survival and spectacle, Nanashi hides her power and embarks on her ultimate fangirl dream—to support and witness the glory of her favorite warriors firsthand. A comedy-fueled, low-key overpowered isekai where fandom meets fantasy!