Mako has been married to her husband for three years, but her husband often has to go on business trips for a week. When she was bored, her friend was busy, so she sent her son to ask her to take care of her for a few days. She had met Shota once a few years ago. The boy is quite studious but seems a bit naughty and especially seems to like her breasts very much... Since Shota was still a child, Mako usually let him do whatever he wanted to do with her breasts. She also agreed to take a bath with him, rubbing his proud child when he got an erection. And the fire near the straw for a long time also burned. A sexually deprived woman and a boy who likes breasts has gradually crossed her boundaries...