When a female teacher, Chie Aoi sees Momona Aino smoking a cigarette, she tells her to show Momona's boobs instead of keeping quiet. Aino is worried about her situation at university and reluctantly complies. Aino is gradually played by Aoi's gentle tits-rubbing technique and feels it. Her nipples are gently stroked, licked and sucked, making them sensitive, and she finally gets her hands on Ms. Aoi's breasts. They rub each other's nipples and reach mutual orgasm. Momona tells Ms. Aoi with a flushed face that she has never felt like this before.