Two childhood friends, Shiori and Masaru, who had lived in a small village, got married. However, there was an old custom in that village: if no children were born within half a year, sexual intercourse would be performed by the inseminator. Seeing Shiori being fucked by someone else right in front of him, Masaru despaired. On the other hand, Shiori can't help but go to him repeatedly because sex with the stud is too good.
