Young Isoyama, just starting his career, was visiting a client's office one day when he was surprised to discover that the woman working there as an administrator was actually his childhood friend's mother. "Oh, Mitsuo-kun? You've become a successful professional..." "You must be tired from all that work. Please have a seat." Isoyama was led to the reception sofa. The long-awaited meeting, coupled with the still beautiful, gentle, and voluptuous figure of his friend's mother, stirred an irresistible urge in the young Isoyama. One day, during another visit to the client's office…