On his way home from his office, the main protagonist drove and ran over a big dog. At that moment, he heard the sudden sound of a voice inside his head. ≪The monster has been subjugated, gaining experience points.≫ 「Eh?」 Before anyone knew, the world has changed. Monsters appear, this is a game-like world where levels, skills, and status exist. This is an adventure where the modern world becomes fantasy and where the main protagonist has to strive hard for his survival. (Source: Shousetsuka ni Narou, translated)