Kaette Kita Moto Yuusha

Once summoned to another world to vanquish the Demon King, a young hero spent three grueling years fighting a relentless war. Upon finally slaying his nemesis and bringing peace to the realm, his reward was far from heroic. Instead of being celebrated, he was unceremoniously dismissed and forcibly deported back to Earth, stripped of his purpose in the fantasy land he had just saved. Returning to a mundane world completely devoid of magic, the former hero is left bitterly frustrated. He laments the life he was denied—a dream of building a harem alongside elves, beastfolk, dwarves, and demons now shattered by his abrupt exile. Refusing to accept this disappointing fate on an ordinary planet where his grand ambitions are impossible, he resolves to take matters into his own hands. Determined not to repeat the mistake that led to his banishment, the hero independently journeys back to the other world. Armed with the hard-earned experience of his previous campaign and a newfound singular focus, he sets out to forge his ideal life. This time, no one will stand in the way of his ultimate goal: establishing the perfect harem in the magical realm he once fought to protect.