At Shishio Academy, a prestigious institution in Japan, where excellence in academics, sports, or lineage is revered, a darker truth lurks beneath its facade. Here, strength reigns supreme, and survival hinges on victory in ruthless games. Guren, a shadowy legend known for his unbeatable prowess, seeks a tranquil life despite his formidable skills. Deliberately failing the entrance exams, he finds himself ranked as the lowly F student. But when a perilous situation threatens his younger sister Karen, Guren's dormant powers surge to protect her, altering his fate in unexpected ways.