幸せな結婚生活を過ごしていた「くるみ」だが、夫の仕事が忙しくなり妊活など夜の営みが減っていた。欲求不満で自慰にふける人妻だが、夫の連れ子にその姿を見られてしまう。黙っている代わりに童貞だから身体を見せてと要求され、しぶしぶ従うが若い男の獣欲が収まるわけもなく…。その日から始まる中出し孕ませ性交…!夫とは違う激しく荒々しいSEXにいつしか人妻は…。Kurumi" was happily married, but her husband's work became busier and their nighttime activities, such as fertility control, decreased. She is a married woman who indulges in masturbation out of frustration, but her husband's stepdaughter sees her doing it. She reluctantly complies, but the young man's lust for her does not abate… The day she is impregnated by the young man, she begins to have sex with him…! The wife is soon exposed to a different kind of sex from her husband's….