Kono Inu to Kitara Mago no Koto shika Kangaeteinai ~Kensei Maou no Yarinokoshi~

For centuries, the world suffered under the brutal rule of the Demon King's Army during an era known as the Demonic Invasion. Countless heroes rose to challenge this tyranny, only to be mercilessly struck down by the Demon King himself. Hope seemed entirely lost until Terios, a legendary warrior celebrated as humanity's final salvation, successfully defeated the dark lord. With the Demon King slain and peace finally restored, the savior Terios quietly vanished from history. Yet, the supposedly vanquished Demon King experiences an impossible resurrection—not in his fearsome original form, but reborn as a small dog. Stripped of his former terrifying power and trapped in a fluffy canine body, he is determined to leave his violent past behind and live out his days in tranquility. This newfound peaceful existence is immediately threatened when his beloved granddaughter becomes the target of the entire world. Forced into an unexpected role as her sole protector, the former ultimate evil must navigate his adorable new reality while defending the only family he has left. What follows is a heartwarming yet perilous tale of a fluffified Demon King fighting desperately to shield his granddaughter from a world that still remembers him as its greatest enemy.