Modern-day Japan where dungeons exist. An utterly ordinary useless human, Asagiri Nayuta quit his job and became unemployed. Then he got addicted to a gacha game and burned through all his savings, couldn’t pay the rent, and was pressured by the landlord to move out. Well then, guess I’ve got no choice but to go to this dungeon thing and make some money! With that idiotic line of thinking, Nayuta dove eagerly into a dungeon and then died. But through the piling up of every possible coincidence, Nayuta revives by possessing the corpse (zombie) of a gloomy introverted girl who had gone in with him. However, that girl was what you’d call a bottom-tier loser woman, like someone had crammed in every possible trait that would make her unpopular with men. Even so, Nayuta doesn’t give up. Awaken the special abilities hidden within the girl’s body, and rise to become the strongest, invincible beautiful girl! This is the story of me, who ended up TS-ing into a bottom-tier loser zombie girl, aiming to become the strongest and greatest beautiful girl!