Five years have passed since Suzume married her kind husband, and she has been living a happy married life, but because of her husband, she has been unable to get pregnant. 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…