とある工業大学の寮母のひかりは男勝りな性格で厳しくも愛情深く学生たちのサポートをしている。工業大学生たちには手先の器用さが求められるため、‘実技対策の一環‘として代々ひかりは自らの乳首を練習台にしていた…。旦那では満足できないド変態寮母が、大きく成長したデカ乳頭をいじられながら性欲を発散する！
Hikari, a dormitory mother at a certain technical university, has a tomboyish personality and is strict yet affectionate and supports students. Since industrial university students are required to be skilled with their hands, Hikari has used her nipples as a practice base for generations as a part of her practical preparation… A perverted dorm mother who can’t satisfy her husband is venting her sexual desire while her big nipples have grown on her!

– JavGG.net