"Years ago, mysterious beings only known as kihei appeared without warningand overran the world. To confront this strange menace, the Twilight Academywas established to train students in black magic and how to battle theotherworldly invaders. Graduates of this school are no strangers to death andmany meet their doom while fulfilling their duty to protect humanity. Kou isjust one more casualty in this war for survival...or so he thinks. Before hecan even appreciate the fact that he’s still alive, a kihei pledges herloyalty to him and vows to stay by his side until the end of days, settingoff a chain of events that can only lead down the road of madness and chaos."