OKYH-010 Yuka, a woman with D-cup breasts at Hakone Yumoto, accepts a towel-only challenge in the men's bath.

At Hakone Yumoto, a woman named Yuka is asked to enter the men's bath wearing only a towel, and she agrees. She is seated between two male bathers who wash her crotch, and her reactions become audible. Later, she is supposed to have water droplets licked from her buttocks, but the licking extends to her genitals.