Joou Heika no Isekai Senryaku

The protagonist is a college student who once found her greatest thrill in commanding the malevolent Arachnea faction within her favorite real-time strategy game. That all changes when she awakens one day in a world that mirrors the game’s setting—though not perfectly—and discovers she now inhabits the body of a fourteen-year-old girl. Despite the discrepancies between this new reality and the game she knew, one crucial truth remains: she is still the sovereign of the Arachnea. The insectile horde under her dominion, a collective known as the Swarm, reveres her and urgently beseeches her to guide them toward triumph. To secure her survival, she nurtures the Swarm and cautiously forges an alliance with the elves dwelling in the neighboring forest. But peace shatters when a passing slayer murders one of her Swarm, and soon after, the knights of a nearby kingdom raze the elven village to the ground, slaughtering its inhabitants. Driven by the desire for vengeance, she readies her counteroffensive. Yet revenge proves little more than a convenient justification—her true aim is to wage war upon the kingdoms of this world. Her tactics are ruthless and precise, honed by countless hours of commanding armies from behind a screen, now brought to terrifying life.