When Renz, a professional gamer studying abroad in Japan, activates a mysterious "Life Simulator" game disc, reality warps around him. He awakens to find a decade has vanished—ten years compressed into what felt like moments. His new life awaits: a loving wife named Erina Nakiri pulled from the past, two children who call him father, and a world that's moved on without him. Caught between the digital and the real, Renz must navigate the comedy and chaos of instant fatherhood, rediscover romance with Erina in this altered timeline, and uncover the truth behind the simulation that changed everything. In this sci-fi slice of life, every moment is both familiar and strange, every memory questioned, and every discovery a reminder that some games have consequences beyond the screen.