A beautiful nurse named Ueshima works at a small obstetrics and gynecology hospital in Tokyo. She is diligent in her work, known for her gentle touch and kind smile that earns her trust from patients and colleagues alike. However, what her close friends don't know is that she has a secret habit - she seduces pregnant women's husbands while they visit the hospital, hiding their trysts even from their wives-to-be. As these men are denied sexual release by their pregnant partners due to their promise not to have sex until after childbirth, their pent-up desires and stress build up. They easily fall victim to Ueshima's advances in various locations throughout the hospital, including examination rooms and delivery suites where their wives are giving birth. With satisfied smiles on their faces, they surrender to pleasure without hesitation. In this collection of four stories featuring adulterous husbands entangled in the clutches of the evil nurse, we witness their downfall as they abandon their loyalty to their pregnant wives.

都内某所にある小さな産婦人科病院に勤める上戸は、仕事に真面目で、細やかな気配りと優しい笑顔で利用者からも同僚からも信頼の厚い美人看護師。しかし彼女には親しい同僚ですら知らない秘密があった。それは病院に訪れた夫たちを、身重の妻に隠れて誘惑するという悪癖…。「出産するまでエッチはダメ」と妻からセックスを拒否られて性欲とストレスが溜まりまくった男たちは、採精室で、病室で、まさに出産中の分娩室のそのすぐ傍で…産みの痛みと戦う妻を裏切り、上戸の誘惑にいとも簡単に堕ちていく。快楽に身を任せ間抜けヅラで果てていく男の顔を満足気に見つめながら上戸は優しく微笑む。「私、幸せそうなご夫婦を見ると、意地悪したくなるんです…」 性悪ナースに絡め取られたクズ夫たちの院内不貞4編を収録。