Our main character is a college student who loves to play as the evil Arachnea faction in her favorite real-time strategy game. One day she finds herself in a world similar to the game world; besides, now her body is the body of a fourteen-year-old girl.
While things are a little different from how they were in the game, one element remains the same: she is the leader of Arachnea. Under her control, the insects, collectively known as the Swarm, praise her and plead for her to lead them to victory. To survive, she raises her Swarm and befriends the elves of the nearby forest.
But after a slave trader traveling through the forest kills one of her Swarms, and the knights of a neighboring kingdom burn down an elven village and exterminate its inhabitants, she prepares to launch counter-attacks in the name of revenge.
However, revenge is just a pretext for attacking the countries of this world. Her team is as masterful and tough as someone who played this game in real life.