After the father remarried, his new wife Mizuna moved into the Kitaguchi household. She devotedly handled the chores, eager to quickly bond with her stepson. However, the son didn't know how to interact with her as time passed. One day, due to the father's busy work schedule, Mizuna was overwhelmed with sexual desire and ended up masturbating alone in the bathroom, lost in the warmth of the bath. Then, she forgot about time and became engrossed in pleasuring her voluptuous body, only to be accidentally seen by her son…
