Scrotal Lingerie

This character wears scrotal lingerie.

Scrotal lingerie or panties is a form of underwear designed to be worn by men or futanari on penile genitalia.
Common kind of scrotal lingerie are: balls sacks lingerie (they look like a balls bra or balls tight panties), penis panties (they look more like condom panties than real panties) and scrotal bikini.

NSFW Balls Panties, NSFW Balls Panties 2
NSFW Penis Panties, NSFW Penis Panties 2
NSFW Scrotal Bikini