In the year 17nn, in an unknown land, a noble family was accused of treason. Only two managed to escape: Guest and Takasugi. In the process, Takasugi's eye was injured. To make matters worse, his health deteriorated, forcing them to seek refuge in a deep mountain cabin. After staying for a few days, a soldier arrived and asked the elderly owner if he knew of their whereabouts, but the old man protected them. Fearing discovery, Guest tried to leave, but the old man offered to hide them on one condition: Guest must follow the 'Five Rules.' They were absurd demands, but with Takasugi's life at stake, there was no choice. Guest stayed, willing to do anything for him. When Takasugi turned 17, he discovered the truth. Guest wanted to die. From that day on, Takasugi hated Guest and left the house. Years later, he returns to this house and declares that, as the head of the fallen clan, he will punish Guest to 'correct' them.