"Sperm donation"……――This is the act of a general male donating sperm for couples struggling with fertility. This time, a couple married for four years appears. "If we end up happy, I think it's fine." Yuri-san, the wife, hopes to use the timing method with the highest pregnancy rate. However, this method requires sexual intercourse with the sperm donor. Naturally, her husband is opposed, but for the future... he finally gives in to Yuri-san's strong persuasion. And while her husband is away, Yuri-san undergoes the procedure and experiences intense pleasure from the long-awaited penetration and ejaculation inside her.
