"Sperm donation" - a procedure where a general male provides sperm for couples struggling with conception. This time, a married couple celebrating their 5th anniversary appears. "It was tough not being able to conceive, so we thought we'd give it a try." Wife Yuki explains to her husband her desperate desire for a child. However, the pre-procedure massage ignites her lust. She ends up initiating sex herself, urging the stranger's erection. "Even if we cross the line, only my husband gets kisses," she thought... but things take an unexpected turn.