The Return of the Retired Demon Lord
El Regreso del Señor Demonio Retirado, El Retorno del Rey Demonio Retirado, Goinkyo Maou-sama no Kaerizaki, Goinkyo Maou-sama no Kaerizaki ~Totsujo Wakagaetta Sensendai Maou-sama wa Choppiri H na Nazo Bujutsu de Josondanpi no Sekai wo Heiteisuru~, Kembalinya Raja Iblis Yang Telah Pensiun, The Retired Demon King's Return ~ The Demon King suddenly rejuvenates, and uses a slightly naughty, mysterious martial art to pave the world of female superiority and manlyness~, ご隠居魔王さまの返り咲き ～突如若返った先々代魔王さまはちょっぴりHな謎武術で女尊男卑の世界を平定する～, 은거 마왕님의 회춘귀환
Synopsis
A sudden bolt of lightning hits an old man…but! The lightning bolt rejuvenated him to the good-looking guy he was in his prime! His name is Gigi Allegarcia. He was called “the strongest who surpassed the strongest” and “a man who was loved by everything but magic”…he was the demon lord of the previous generation.