Koko wa Ore ni Makasete Saki ni Ike to Ittekara 10-nen ga Tattara Densetsu ni Natteita.

In a desperate battle against overwhelming demonic forces, the young adventurer Luck makes a fateful choice: he volunteers to hold the line alone so his comrades can escape. What begins as a probable final stand, however, becomes an epic decade-long saga of survival.

Through a blend of fortune, unmatched skill, and sheer ingenuity, Luck does the impossible and single-handedly endures for ten years. When he finally emerges victorious, he returns to a world that now sees him as a living legend, yet he himself must navigate the strange reality of being both a celebrated veteran and a man out of time.

This anime explores the themes of legend versus reality, the weight of immense reputation, and the personal journey of a hero finding his place in a peaceful world he fought so hard to create.