Voluptuous milf Shihoko Terashima loses her anal virginity and gets creampie in both holes! Having struggled to pay high tuition and donations to get her son into a prestigious school, her son's chance for university recommendation is threatened. Her son's homeroom teacher exploits her vulnerability, blackmailing her into anal sex in exchange for securing the recommendation spot. Though Shihoko agrees and secures the spot, her son gets into a violent incident, forcing her to publicly apologize at a parent-teacher meeting. As punishment, Shihoko undergoes a humiliating, painful, yet pleasurable sensual training that overwhelms her with shame and arousal.