When Ryoma Mikoshiba, a regular high school student with martial arts skills, is unexpectedly transported to a different realm by the O’ltormea Empire, he discovers a dark truth. The empire's practice of absorbing strength from the slain shocks Ryoma, leading him to rebel by taking down a key figure in the empire. As he tries to flee without revealing his true self, he encounters a pair of enchanting twins—one with golden locks, the other with silver hair—setting a fateful chain of events into motion. Thus begins the tale of a young ruler's struggles in a fantastical world ravaged by war!