Her relationship with her live-in boyfriend is a bit uneven, and their nighttime activities feel somewhat obligatory. Despite spending ¥400,000 a month improving herself, the loneliness of not being embraced by the man she most wants to see drives her to take on the challenge of appearing in an adult video. "I don't love him, so this isn't cheating," she tells herself, and strips off her clothes to reveal a stunningly slender, beautiful body with naturally beautiful F-cup breasts and a stunningly slim waist. The careful foreplay she receives from the man she's just met awakens her dormant female instincts, and every time she accepts a stranger's penis, her sinful juices begin to flow. The sight of her beautiful naked body trembling and climaxing as she is passionately loved as a young woman is truly a work of art. What started as a challenge soon turns into a secret affair that melts her heart.