SUWK-012 极端的家长教师协会母亲，每周一次与长子的年轻班主任（43 岁）秘密进行一小时的卡拉 OK 之恋，以此排解心中的郁闷。
原標題: SUWK-012 長男の担任の若手教師と週一、1時間のカラオケ密会不倫で欲求不満を解消する絶倫PTAママ（43） 古東まりこ
Mariko is an officer of the PTA at her eldest son's junior high school. One day, at the suggestion of the PTA president, she and her son's homeroom teacher decide to hold a party to celebrate the school festival. After a lively first party at an izakaya (Japanese-style bar), they went to the second party, a karaoke party. Mariko is frustrated, and she sets her eyes on her eldest son's homeroom teacher. Using her experience as an older woman and her motherly nature, she seduces him closely. Soon the two have an affair...
