Demon Slayer: I Became Yoriichi's Father and Married Muzan to My Son

Transmigrated as Fūgen Tsugikuni, father of legends Yoriichi and Kokushibo, I face an absurd dilemma: how do you reform the Demon King? After capturing the cowardly yet murderous Muzan Kibutsuji, I drag her home and subject her to a brutal rehabilitation regime—wisteria tea at dawn, mandatory sunbathing, household chores, and the occasional Nichirin Blade 'massage.' Her survival strategy? Grit your teeth and endure. But when your son is the strongest demon slayer in history and your daughter-in-law is the progenitor of all demons, family dinners get complicated fast.