A man provides his sperm... This is an act where general men offer their sperm for couples struggling with infertility. In this case, a married couple has been together for five years. The wife, Yuki, explains to her husband how much she wants a child despite not being able to conceive naturally. As they prepare for the procedure through massage, their sexual desires ignite. Eventually, they engage in intercourse with a stranger's penis, even though they had agreed to limit themselves to kissing only their husband. However, things get heated up quickly, leading them to cross boundaries. It should be noted that the recorded contents may vary depending on the broadcast method used.