Margin, a support member of the Hero’s Party summoned from another world to help defeat the Demon King, fights bravely through the final battle. But just as he destroys the Demon King’s core, his comrades suddenly turn on him — casting a petrification spell that seals him in stone. When he finally awakens, thousands of years have passed. Shocked and drained of will to live, Margin struggles to adapt — but through the kindness of new people he meets, he slowly begins to move forward again. Why did his companions betray him that day? Determined to uncover the truth, Margin sets out on a new journey across a world that has long forgotten his era. A grand isekai adventure fantasy of mystery and redemption — the tale of a man pursuing the truth behind his comrades’ betrayal in a world thousands of years in the future!