Saki has broken both arms and legs and faces three months of recovery, but boredom drives her to force an early discharge and return home. Since she cannot eat, use the toilet, bathe, go out in her wheelchair, or do anything else without help, her husband hires his college-age younger brother to care for her over summer break. Seeing Saki immobilized in casts and unable to resist, the brother-in-law begins treating every caretaking task as an opportunity to molest her. Telling her that she cannot escape him, he plans to keep his sister-in-law as an obedient human sex toy until she fully recovers.