Takatsuki Makoto's stats barely register above human baseline, making him the definitive weakest among class 1-A's otherworldly transfers. While his peers—Heroes and Sages armed with broken cheat abilities—forge ahead effortlessly, Makoto grapples with a catastrophic ten-year lifespan limit and the looming revival of the Great Demon Lord. Trapped as a mere Mage Apprentice in a fundamentally broken system, he questions whether this isekai is anything more than a poorly designed nightmare. Then comes an impossible offer: become the believer of a breathtaking Goddess with zero followers. Her proposition transforms despair into purpose when she reveals her imprisonment and desperate need for rescue. Despite overwhelming odds—a collapsing world, laughably weak abilities, and mounting supernatural threats—Makoto accepts the challenge. His journey becomes one of defiance against impossible circumstances, where a discarded mage must somehow navigate escalating dangers, forge unlikely bonds, and save the very deity betting everything on him. This is the tale of the weakest mage's fight to conquer an isekai stacked entirely against his survival.