"Sperm donation" is a system where ordinary men provide their sperm to help couples struggling with fertility. This time, a married couple in their fourth year of marriage appears. The wife, Yuuri, hopes to undergo the method with the highest pregnancy rate, saying, "As long as we end up happy in the end, I think it's fine," strongly persuading her husband. However, since sexual intercourse with the sperm donor is essential, her husband is somewhat resistant, but thinking of their future, he eventually gives in to Yuuri's persistent persuasion. With her husband absent, Yuuri receives the sperm donation procedure. After a long time, the penetration and creampie bring her intense pleasure...