Shizuka is initially excited by perverted acts such as anal exposure, foreign object insertion, pissing, and forced flatulence, but by the second play, she has transformed into a complete scat slave, happily licking feces. On the other hand, Hiromi, who harbored scat desires, loses her rationality when stimulated by the smell emanating from the anus and is drawn deeper and deeper. The scene depicts the intersection of the two women's desires as they approach the extreme.