https://www.dlsite.com/books/work/=/product_id/BJ107701.html
As always, please support the artist and buy his works.

Committee Chairman, Didn't You Just Masturbate In the Bathroom? I Can See the Number of Times People Orgasm

How...did you...find out...nnnn!"
The chairperson faints in agony under the questioning of her overly sensitive pussy.
She is about to come, but she doesn't want to admit it yet...?

--I've got the "ability to see how many times other people have come" from a naughty sister who claims to be a goddess.
While testing the power with half a doubt, I happened to notice that the head of the class increased the number of times she climaxed before and after she got up from her seat to use the restroom.
I called her up and tried to trick her... and sure enough, she was masturbating!
When we play with her on the spot, her already wet body comes instantly!
This ability is too good! Viva the dreamy pac-pac life!

Webtoon english version (chapters 1-130): https://e-hentai.org/g/2692454/415d0aa9a2/