In dire need of funds, Souya joins a risky mission resembling a game quest: journey to a magical realm with a skilled team and conquer a tower dungeon for its treasures. However, a mishap during the transfer leaves him stranded in this new world all by himself. Seeking companionship, he gathers a diverse group of allies—from exiled elven sisters to a mischievous Goddess who enjoys taking feline form—to form a team capable of facing the tower's dangers. Torn between unscrupulous nobles and traders outside the dungeon and lethal creatures inside, will this unconventional group overcome the odds? Or will Souya's expedition meet a premature end?