The close-knit Tojo couple (Koji and Natsu) had been struggling with infertility for years. However, it was discovered that the cause was the husband's 'azoospermia.' The husband suggested using a sperm bank out of guilt, but the wife resisted accepting sperm from an unknown third party. One day, the husband's favorite subordinate (Ryohei) was invited to their home… After the husband passed out drunk and fell asleep, the wife directly pleaded with the subordinate for 'sperm donation.' She insisted that this is 'not an affair,' but their relationship goes beyond the 'donation' framework, becoming a complex mix of emotions and desires. From 'acts for fertilization' to 'relationships seeking each other'... amidst guilt and a sense of depravity.
