Suzume has been happily married for five years to her kind husband, but she has not been able to become pregnant as a result of her husband. One day, her husband, who desperately wants a son, suggests that she get a sperm donation, and she agrees for the sake of her husband. Then, she ends up having sex with her husband’s old best friend to conceive. At first, she is nervous, but as they continue to do it many times…