Anime identification request about guy with invisible pills (hentai) I'll just describe it as I don't want to post NSFW links (plus I can't find them anyways).
I just saw it on some fishy site somewhere, and the story was interesting, at least for me.
The video was raw, so I didn't understand any of it.

This is what I remember of it:


The MC is a guy who is a store employee together with two girls
One girl is a harsh manager of sorts, the other a shy-type
One day an old guy appeared suddenly, giving him pills that can make him invisible
He tested it and sure enough, he became invisible
Forgot some of the "meaty" parts, but one involved doing it with the harsh manager, and one doing it with the shy-type. There were other girls involved, but I can't remember them.


That's all I can remember.
As OP describe It sounds like The Invisible Stud contain nsfw image.

Synopsis:


  Mie happened to pick up medicine that an old man dropped. When he took the medicine, his figure disappeared. Soon he went to a public bath to peep, and began to molest. Then, he went to an all-girls school.


And there only three character Fujisawa , Mei and Suzu.