Demon Slayer: Kimetsu No Yaiba: Regret Repairer

Traveling through the Taisho era of demon slayers, you become Fujiwara Yoaki, an orphan whose family was slain by demons, and bound to the regret repair system! In his previous life, he was well versed in the plot of demon slaying. He witnessed with his own eyes the burning of the Flame Pillar, the sacrifice of Sister Ren, and the fall of the Xia Pillar. He wanted to rewrite all the regrets engraved in his DNA in this life! System warning: Yanzhu will encounter the first string on Infinity Train, with a countdown of 720 hours! "Mr. Purgatory, this time, I won't let you burn out alone!" Repair your regrets, understand the breathing method, and strengthen your body. From barely fighting against ordinary ghosts, you will grow into the strongest swordsman under Yuanyi! No spoilers, no Holy Mother, just rely on the layout and planning, the guard pillars are thorough, there will be no tragedy, the tragedy will be ended, and the fate of the Demon Slayer Corps will be rewritten for thousands of years! The system travels through the system with no regrets and strong column-level growth. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.