While driving home from work, the protagonist accidentally hits a large dog, triggering a strange message in his mind about subduing a monster and gaining experience points. Perplexed by this sudden development, he finds himself in a world transformed into a game-like setting with monsters, levels, skills, and statuses. In this fantastical realm blending modernity with fantasy, the protagonist embarks on a challenging adventure, fighting for survival and adapting to his new reality.