Our protagonist is a college student who enjoys playing as the evil-aligned faction Arachnea in her favorite real-time strategy game. One day, she finds herself in a world similar to the one in the game; additionally, her body is now that of a fourteen-year-old girl. While things are a bit different from how they were in the game, one element has remained the same: she is the leader of the Arachnea. The insects under her control, collectively known as the Swarm, praise her and implore her to lead them to victory. In order to survive, she raises her Swarm and forms friendly relations with the elves of the neighboring forest. But after a slaver traveling through the forest murders one of her Swarm and the nearby kingdom's knights burn down the elven village and massacre its people, she prepares to launch her counterattacks in the name of revenge. However, revenge is merely a pretense for attacking the countries of this world. Her command is masterful and severe, as one who has played the game in real life… ---

Her memories of being a military geek in her previous life awaken, and she remembers she’s in the world of an otome game she played in her previous life.And what’s more, she’s what people refer to as a ‘villainess’.In the game, the villainess is destined to face a destruction ending, but this girl is different.If you don’t want to be destroyed yourself, you have to destroy them first!In this way, our protagonist who is obsessed with recreating the power of modern weaponry using magical techniques by taking advantage of the magical talent bestowed upon the villainess, realizes it at last.The heroine? The prince? Shaming her family? Being exiled from the country?If only a bad end is destined for her, then she has to crush it through sheer firepower!