College student Ippei discovers a formula that can render him invisible. He uses it to spy on women’s bathhouses, and have sex with female students. A professor becomes aware of his activities and punishes him.
![Daughter in law The Day I Hit My Belly Button [Uncut]](https://cdnupload.com/wp-content/uploads/2023/11/Daughter-in-law-The-Day-I-Hit-My-Belly-Button-2021bv.jpg)
