Akiko, the female teacher assigned to the Special Advance S class, found herself among elite students who had been completely brainwashed by their homeroom teacher, 'Old God.' Learning about the existence of a rape video that had forced the previous teacher into a leave of absence, she confronted the students out of a sense of justice, only to find herself facing the same fate. Chained by the 'Red Collar,' a symbol of their enslavement, she was repeatedly raped and meticulously trained to become a versatile sexual processing pet, finding pleasure in any penis.
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