What will you do if your school turns out to be the cause of your nightmare?? What will you do when the school where you suppose to study will became a battlefield between life and death, friendship or yourself, love or fame, light or darkness. The place where innocent people became murderer and the murderer became the prey... KILL THEM OR THEY'LL KILL YOU.. BETRAY THEM OR THEY'LL BETRAY YOU... are ready to enter the M. ACADEMY? And know the reason behind the SIN on the ACADEMIA.. the killings begun and it's done with an unimaginable torture. No one knows who's the murderer, the student are scared and stunned to speak. All of the officers at the school became alarmed after what happened and started to work at their limits