From Betrayed Hero to Invincible Demon King

Shunned and despised for his appearance, Galius endured a lifetime of cruelty from the very people he swore to protect. Despite being branded as ugly by society, he remained a steadfast hero who dedicated his existence entirely to the salvation of mankind. Yet, his unwavering devotion was ultimately met with treachery. When humanity turned its back on him in his darkest hour, the bond between the hero and the people he served was shattered forever, leaving Galius with no choice but to forsake them in return. Cast out and broken, he unexpectedly found solace among the demon kind. Where humans offered only scorn, the demons extended genuine compassion and warmth, showing him a sense of belonging he had never known. Moved by their unexpected kindness, Galius resolves to abandon his former life and dedicate his strength to helping the demons forge a utopian paradise of their own. Wielding the supreme power bestowed upon him by God himself, the former champion of humanity steps into a new destiny. This epic isekai fantasy chronicles the extraordinary journey of a betrayed hero who rises to become the ultimate, unconquerable Demon King.