The Sasayama family is a single-parent household where mother and son have lived together, supporting each other. However, when the son Shinya became an adult, he moved out of the house to work and live alone to make things easier for his mother. He sent money home while doing so. But after a year of living apart like that, Shinya finally had a long holiday and decided to go back to his parents' house where his mother was waiting for him... But the year was too long for this mother and son. Their love and bond became stronger than ever, and the son desired his mother excessively, and the mother climaxed over and over again with the penis of her beloved son, which she had been waiting for so long.