I still don't know what's those round things around long hair guy's dick

They're piercings

Piercings, yup. It's called a Jacob's ladder.

Supposedly they’re beads

I just searched it. Why do they do this lmao

Body modification. It's like piercing but extreme

I thought it was a pearling, common in prisons and since jingi is a sex addict in the first few chapters before having MC as a buffet. Is it a jacobs ladder on raws?

Beading is much more common in Asia so I'm thinking its that and not piercings. It also is much more "usual" in non-alt people (beading I mean)

Yes it's pearling/beading. I just compared it to piercing for other people to have an idea why some people does that