Betrayed by his own men, Captain Grahad Mills, a commander of the SAA Special Force "Jackal," is held responsible for a conspiracy about which he knew nothing. Without defense counsel at his court, he is sentenced to death. On the morning of his execution, he escapes the military detention center; in the process blasting a troop of national military guards and killing its commander--Captain Waldman, his former subordinate and betrayer. All this is for revenge and to find out the reason for the treachery. The former hero--feared and known as "Genocide--starts to fight a battle he created by himself.
Makoto develops an interest in Kotonoha, and although they both take the same train to school, she seems to be unaware of his existence. One of his classmates, Sekai, gets the two together despite holding strong feelings towards Makoto.
NOTE: The story is divided into a total of eight chapters: four "Question" arcs and four "Answer" arcs. Each chapter keeps the same main characters, but ends in a different way. However, each chapter gives valuable answers, hints, and clues to the previous one, while at the same time bringing forth even more mysteries.
The question arcs are: Onikakushi-hen, Watanagashi-hen, Tatarigoroshi-hen and Himatsubushi-hen.
The answer arcs are: Meakashi-hen, Tsumihoroboshi-hen, Minagoroshi-hen and Matsuribayashi-hen.
The side story arcs are: Onisarashi-hen, Yoigoshi-hen, and Utsutsukowashi-hen