The youngest of three sisters born into a renowned high-end kimono shop in Kyoto uses her top-tier English skills, including TOEIC scores over 800, to thrive at a cutting-edge IT company. She has been in a long-term relationship with her boyfriend, a rugby player, since college, and the two have even considered marriage. However, due to her weak resistance to pressure, she was targeted by her boss and forced into an affair. Recently, she has begun embracing her masochistic side, indulging in exhibitionism outdoors and submitting to intense, erotic training, finding pleasure in depraved, lust-filled sex.