Belly Martin is a 17-year-old high school student whose life is a relentless series of misfortunes. Cursed with catastrophic bad luck—so much so that even a simple trip to the store turns into a disaster—Belly's existence is defined by absurd setbacks. His troubles began when his father, under the guise of "buying milk," abandoned him to pursue a ludicrous pirate quest, leaving behind a bizarre letter about a legendary treasure that doesn't even exist. Alone and ostracized by society, Belly's everyday life is a comedy of errors: job interviews end in catastrophe, and even the mere mention of his name sends people fleeing. Just when he thinks his life can't get any worse, fate takes an unexpected twist. In a surreal moment reminiscent of his favorite isekai manga, a flying truck crashes into his world, catapulting him into a fantastical realm. Now trapped inside a chaotic fantasy game world, Belly must navigate an environment filled with eccentric nobles, snarky NPCs, and self-aware, fourth-wall-breaking humor. Amid absurd challenges and over-the-top adventures, he gradually discovers bizarre new skills—each as useless as they are hilarious. As Belly struggles to survive in this unpredictable universe, he finds that his curse might just be the key to unlocking a destiny he never imagined. "Unlucky Bastard" is a rollicking isekai parody that turns a lifetime of misfortune into an epic, humorous journey of self-discovery, where being the unluckiest person in the world might just be the greatest gift of all.