My Mother Has a Sex Friend. Mako Morishita

A single-mother household. The son, coming of age, deeply loved his mother, Asako Morishita. He had always thought of his mother as a hardworking, virtuous woman, but she actually had a sex friend. The story of the teenage son's anguish upon discovering this truth began. However, his mother suddenly revealed her womanly side. The teenage son, while tormented, peeked at her acts with her sex friend and got excited, panting heavily...