One day, a young wife named Hotaru finds herself babysitting Shota, the son of an acquaintance. Shota, who has a huge obsession with big tits, is immediately captivated by Hotaru's massive breasts. He quickly shows off his bratty nature, but since Hotaru completely ignores him, treating him like a mere child, he has free rein to play pranks on her! The acts escalate from breast rubbing to titjobs and eventually to creampie sex!