Mari's husband's company fell into financial ruin due to debt, forcing her to rely on her wealthy uncle, Tetsu. In exchange for covering the debts, Tetsu demanded that Mari serve as his live-in housemaid. However, he was an insensitive and repulsive man whom she found difficult to accept on a physical level. For her husband's sake, Mari reluctantly obeyed and began working as a submissive maid. While cleaning, she accidentally broke an expensive vase and unknowingly fell into Tetsu's trap. Mocked and humiliated, she was forced into an extreme maid outfit and made to live as his creampie pet. The story follows how Mari copes with this situation, gradually undergoing a transformation in her feelings and mindset.