"Sperm donation"... is the act of ordinary men donating sperm to couples who are struggling to conceive. This time, we have a couple who have been married for five years. "If we do the syringe method many times, it ends up costing a lot of money..." The husband and wife, Yuki, chose the timing method for its reliability. The timing method requires sexual intercourse with the sperm donor, but since both the couple consider it a chore, the discussion went smoothly. Then, later on, Yuki successfully received the sperm donation in the form of a creampie, but he is worried that just one time is not enough, and begs the donor for a second and third time. Any more than this would mean she is cheating. The donor tries to stop his lewd wife, but...