Yu, a mother passionate about education, became even stricter with her son who was preparing for exams. However, one day she found adult videos in his room. 'I don't want you watching such filthy stuff!' Yu shouted, but her son retorted that he wasn't her tool. Moreover, the son had sexual curiosity towards Yu's mature body and vented his stress from past restraints by attacking her! Overwhelmed by the unexpected counterattack, Yu ended up in a forbidden relationship with her son... As the son's endless sexual retaliation continued, their former dominant-submissive relationship reversed...
