真面目で品もあり男性社員からLcupと噂されるOL‘木村愛心’は ある日、冷え性に悩み、友人の勧めで「心身ともに温まる」とネットで噂の隠れ家エステへ足を運ぶことに。彼女を出迎えたのは、柔らかな物腰の男性セラピスト。全身が芯から火照るような特製オイルを使ったマッサージはどこまでも丁寧で心地よい。しかし、その指先が這うたび、愛心はこれまでに感じたことのない甘くねちっこい熱に翻弄されていく。「こんなの…初めて…」戸惑う間もなく、張り詰めていた理性がドロドロに溶かされていく。未知なる快感の波に飲み込まれ、彼女は次第に声にならない甘い吐息を漏らし始めるのだった__極上の癒やしと背徳感。ついにその手が胸部、股間へと伸びるとビクビクビックーン！「あぁあぁ！！！イ！イッちゃうぅぅ！！」上半身、重そうな乳房が重力を無視しソリ上がる。施術が終わった後も、あの熱を帯びた甘美な余韻が頭から離れない。「また……あのエステに行きたい……」一度味わってしまった禁断の蜜の味。回を重ねるごとに、昼間の真面目で気品ある姿からは想像もつかない「女の顔」へと堕ちていく美しきOLの秘密の物語。
'Kimura Aimi,' a serious and refined office lady rumored to have an L-cup bust among her male colleagues, suffers from poor circulation one day and, on the recommendation of a friend, visits a hidden spa rumored online to "warm both body and soul." She is greeted by a gentle-mannered male therapist. The massage, using a special oil that makes her whole body feel warm from the core, is incredibly thorough and comfortable. However, with each touch of his fingertips, Aimi is overwhelmed by a sweet and sticky heat she has never felt before. "This is…the first time…" Before she can even react, her strained rationality melts away. Swallowed by waves of unknown pleasure, she gradually begins to let out sweet, inarticulate sighs—the ultimate relaxation and a sense of transgression. Finally, his hands reach her breasts and crotch, causing her to tremble and convulse! "Ahhhh!!! I'm! I'm coming!!!" Her upper body and heavy breasts arch upward, defying gravity. Even after the treatment was over, the warm, sweet afterglow lingered in her mind. "I want to go back to that spa again…" The forbidden taste of sweetness she had once experienced. With each visit, this beautiful office lady's secret story unfolds as she descends into a "woman's face" unimaginable from her serious and dignified daytime demeanor.

– JavGG.net