In a small village, a boy named Soujo Kikasi is brought to an Accilerated academy, Obligato Academy, for having succes in medical school. He then is welcomed with warm hugs until disaster strikes. Mysterious murders happen often, almost every HOUR. Insanity breaks out in the academy and lock down is activated meaning there is no way out, as Obligato has top security. What wrong can happen? After all school is a safe place.