Yumi decided to enroll in swimming lessons to overcome her fear of water. However, all the other students were men, and Yumi found herself increasingly affected by their gazes. Since she couldn't swim, she continued to receive close, hands-on instruction from the male instructor, whose athletic physique beneath his competitive swimsuit gradually began to stir emotions within her. What started as a simple lesson soon took on increasingly sexual overtones, bordering on harassment. From that day on, men gathered around Yumi, subjecting her to various forms of sexual harassment.