Miyazono Kazuha, a married woman unable to bear children. Upon learning that her husband is the reason for her infertility, she finds herself in a helpless situation. During her husband's business trip, her brother-in-law visits their home. He reveals that he is also saving sperm for fertility efforts. Kazuha decides to use this sperm! With all her weight, applying a maximum pressure of 230kg, she injects it deep into her cervix with a seed-extracting press, repeatedly forcing it in during her fertile period! Her plump buttocks are struck repeatedly!