Demon Slayer: My Surname Is Jiguo, and I Am Also a Dragon Pillar.

(Not married + single + no system + free from the ghost king) Jiguo—this surname is both the glory of the beginning and the tragedy of the end. When a man inherited the name of "Stepkuni", he was Stepkuni Iwakatsu's sister, and she was also a swordsman who mastered the new "Dragon Breath". When he stood at the top of the Demon Slayer Corps with the name of "Dragon Pillar", he got the same strange disease as his mother. When he was about to die, he saw a ghost, but she couldn't swing the sword in her hand. Just because he was the dearest brother, stepkuni Iwakatsu was forcibly turned into a ghost by her sister. He can only be forced to retire and become another ghost king. When he saw the child demon disgusting his sister, he was seen by Hei Shimo Hei Shimo: Damn, this is my sister, get out of here!