In a world where magical portals and dangerous beasts keep appearing, humanity has organized ranks for heroes, from Rank F to Rank S. The strongest fight for fame and fortune, but there's one problem: while the world is teeming with S-ranked prodigies, one Rank F hero, Rin Park, seems to always end up saving the day—accidentally.
On the surface, Rin is your typical F-ranked hero, barely passing the entrance exam and assigned to a tiny town with little to no action. But unbeknownst to everyone, Rin has a peculiar gift: he attracts bad luck. If there's a powerful enemy, they will somehow end up stumbling upon Rin, often resulting in a chaotic, explosive battle where Rin emerges victorious… by sheer accident.
