Shishio Academy is a prestigious the best school in Japan in which only the elite of such fields as study sports pedigree can study But in reality it is a school of principles of devouring the weak by the strong where everything is measured by the results of the games This is a massacre in which only a definite winner can survive
Guren is a legend of the shadow world conquering and invincible and at the same time he wants to start a normal carefree life He fails the entrance exams to the academy on purpose therefore following his results he qualifies as the lowest grade F However after reuniting with his younger sister Karen the situation changes dramatically And when his sister is in danger he shows his true abilities
