The war between humans and witches has ended. Quo, a girl who is the ultimate superhuman soldier also known as a "Witch Hunter," receives an order to "hide her identity and live a normal school life" in order to prove her own safety. If she fails, she will be disposed of immediately, making it a life-threatening mission. However, she has an even bigger problem. Quo is extremely shy and has the weakest communication skills. Furthermore, at the school where she infiltrates, she meets Luca, a survived enemy who desires peace, and Noel, a junior "Witch Hunter" who transferred to the school to monitor Quo's mission --!?