Based on the erotic game by Astronauts: Sirius.

"Vatican" is a dark organization where molesters gather. The members, known as "touchers", stream videos of the obscene acts they perform on a daily basis to specific members. One of these "touchers", Kiichi Kusakabe, seduces his target women one after another with his incredible skill. A young voice actress, a dark-skinned gal, a bratty schoolgirl, a famous swimmer... Before long, he meets rival "touchers" and is challenged to a "molester showdown" to compete in a contest of skill!!

(Source: parabook, translated)