A man finds himself alone with a nymphomaniac in a mixed-sex hot spring where towels are prohibited... He stares intently at the exposed breasts and nipples of the beautiful girl who is in the same bath as him, and their eyes meet, creating an awkward atmosphere. In the silence, the woman notices the man's erect penis and transforms into a lustful being!? She teases him by showing off her breasts and masturbating her nipples, then escalates further to handjob, fellatio, and kissing to seduce him! The man's balls are left empty after being outmaneuvered by the nymphomaniac he just met...