Gravure idol Rin arrives at a massage parlor known for its "sensuality development program," unaware of its true nature. Despite her confusion over the strange explanations and embarrassing questionnaires, she decides to proceed with the treatment out of anticipation. Before she knows it, her entire body is coated in lubricant, her sensitive skin being kneaded by the masseuse. Powerful aphrodisiac massage oil stimulates her breasts and genitals, forcing her into an unwanted sensuality development. Overwhelmed by the intense pleasure, her consciousness blurs, and her rationality crumbles. Eventually, she finds herself craving the next program. Rin learns to achieve orgasm by having her G-spot rubbed with a penis while lying on her back. The escalating erotic massage program pushes her beyond her limits...

「性感開発プログラム」が売りのエステとは知らずにやってきたグラビアモデル凛。怪しい説明、恥ずかしいアンケートを受けるもその効果に期待して施術を受ける事に…。気づけば全身オイルでヌルテカにされ敏感ボディをマッサージされ、強力な媚●入りオイルで性感帯の胸や性器まで刺激され無理やりに性感開発されてしまったのだ。あまりの快感に意識朦朧～理性崩壊！遂には自ら次のプログラムを求めてしまう。仰け反りながらGスポットにチンポを擦り付けてイク事を覚えた凛！エスカレートするエロドレナージュプログラムは限界を超えていく…。