Stolen mother-in-law's anus. A widow who sacrificed her butthole for her son's future.

Reiko realizes that her husband's stepchild, Yuuma, has feelings for her that are even greater than those of her mother. Although she was happy about this, her rationality as a mother prevented her from crossing the line, but on the 49th day of her husband's death in a traffic accident, the two of them engaged in a forbidden anal relationship. One day, as Yuuma is thinking about his bright future as he plans to establish himself as a potter, Yano, an art critic, comes to visit...