JUR-869 — When my wife's friend, Koyuki, heard that she was trying to conceive, she asked me for my sperm, and I couldn't resist, so I got hooked on having an affair and getting pregnant...

Satoshi is being pressured by his wife, who has suddenly become anxious as her childbearing years draw to a close, to have a baby. One day, his wife's friend, Koyuki, comes to visit... Although she claims to be trying to conceive, her marriage is not going well, and she is living a life of estrangement. Seeking warmth, she asks Satoshi, "Please have sex with me just once." Meanwhile, Satoshi, who is starting to feel a sense of obligation and weariness in his sex life with his wife, gives in to her advances...