Demon Slayer: The Regret Mender

After transmigrating to the Taisho era of Demon Slayer, Fujiwara Yomei, an orphan whose family was slaughtered by demons, binds himself to the Regret-Mending System!

Having thoroughly studied the story in his previous life, he witnessed the Flame Hashira burn out, Shinobu's sacrifice, and the Mist Hashira's fall. In this life, he will rewrite every regret etched into his DNA!

System Warning: The Flame Hashira will encounter Upper Rank One on Mugen Train. Countdown: 720 hours!

"Mr. Rengoku, this time, I won't let you burn out alone!"

Mend regrets, master Breathing Styles, and strengthen his body. From barely holding his own against ordinary demons, he grows into the strongest swordsman beneath Yoriichi!

No spoilers, no saintly protagonist. Through careful planning, he protects the Hashira, kills Muzan, ends the tragedy, and rewrites the Demon Slayer Corps' thousand-year fate!

System, transmigration, wish fulfillment, no regrets, Hashira-level growth

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.