START-271 The dorm mother who acts like a man is used daily by the engineering students as a practice dummy for their practical exams, having her nipples tweaked until they hurt. Her nipples have been continuously developed and grown large. Hikari Aozora

The dorm mother Hikari at a certain industrial university has a masculine personality, strict yet deeply caring as she supports the students. Since industrial university students require dexterity, as part of 'practical countermeasures,' Hikari has been using her own nipples as practice targets for generations... The perverted dorm mother, unsatisfied by her husband, releases her sexual desires while her large, developed nipples are being played with!