Due to popular demand, here is the fourth installment! This time, it's a married couple special! ! A married man and woman in a hot spring town are hung up separately and left alone in a mixed bath under the pretext of a mixed bathing monitor experience! They're suddenly naked when they first meet! Their erect cocks, their pubic hair and nipples that suddenly catch their eye... They didn't mean to, but they get horny! ! Will these two, who are neither lovers nor husband and wife, get turned on while bathing?