HSODA-129 "Look at my grown nipples!" This mute freak has nipples bigger and more sensitive than a clit. Her name is Kuinai Sanao.

One day during college, a man passed out drunk at a drinking party and woke up in his senior Kui's room. There he found out about Kui's secret hobby of 'breast growth masturbation' and ended up in a relationship with Kui that they couldn't tell anyone about. Time passed, and the man started working at the same company as Kui. The two continued their secret relationship as usual. Since student days, nipples even more sensitive had been cultivated into organs of pleasure surpassing the clitoris! Furthermore, Kuino cultivated his own nipples and those of men. Men who go crazy over a type of pleasure entirely different from the dick. And women who get wet watching such a sight. The culmination of a woman's terrifying breast development records, obsessively pursuing nipples in a perverted way.