Half a year into her marriage, young wife Rui has been living happily every day. One day, while she was home alone, Tenkawa, her golf instructor, came by to return a forgotten item. Right then and there, an impromptu lesson began. Though hesitant, Rui resists as Tenkawa pulls her into an embrace. However, once he discovers her husband's perverted games, Tenkawa becomes obsessively fixated, subjecting Rui to relentless humiliation. Using her husband's imminent return as an excuse, Rui finally forces Tenkawa to leave.