Mercy grew up in a small village, his father, Kazuki Hinjuaro, was the village chief and Mercy's mother was getting abused and assaulted 24/7. Mercy's mother was killed by his father because she was resisting to satisfy his needs. Mercy ran and met a friend named Iron, Iron is an elite swordsman with formittable skills. Mercy and Iron trained together, Mercy has a fighting style called Hakai-No-Ken. One day, Mercy wants to kill Kazuki Hinjaru for the pain he has cause. Mercy is 18.