After her husband went on a long business trip, Yuuka, out of loneliness, strayed from the path. She ended up having a physical relationship with her only son, Akira. Yuuka's sensitive nipples were constantly toyed with, and she became a body that could no longer live without Akira. Then, when her husband's business trip came to an end... Yuuka and Akira were forced to make a decision. "It's not allowed for parents and children to have sex... You understand, don't you?" Yuuka admonished Akira, but... Akira, not convinced, still toyed with her nipples...
