It's a single-mother household with one son, but her son has grown up nicely. Miki was relieved that she had successfully fulfilled her role as a parent, but at the same time, she felt lonely for herself, who had forgotten the joy of being a woman in a life that prioritized raising her child. Miki's loneliness suddenly bursts out when her son gives her a massage. Her nipples, which were bare, were accidentally touched by her son's hand. A lewd moan leaks out reflexively. Triggered by a minor accident, Miki awakens to the nipple pleasure that turns on just by touching it…