The story follows Koji, a talented martial artist who dreams of becoming the world's strongest warrior. He enrolls in the prestigious Warrior's Academy, where he meets a group of equally skilled fighters, including a beautiful and powerful female warrior named Yui.

As Koji trains and competes against his classmates, he also finds himself becoming the object of affection for several of the female fighters, each with their own unique personalities and fighting styles. With his harem growing, Koji must navigate the complex dynamics of his relationships while also striving to become the ultimate warrior.

But as Koji's fame and reputation grow, he also attracts the attention of rival warriors and dangerous enemies. He must use his skills and wits to protect himself and his harem, while also uncovering the secrets behind the mysterious martial arts techniques that have made him a target.