An unexpected tragedy occurred at a secluded hot spring inn... The whole story of the obscene incident that targeted the open-air bath, which is supposed to be a healing space, is revealed! In the steam, perhaps due to the sense of freedom of mixed bathing, the wet body of the woman arouses the man's sexual desire, robbing him of his reason and exposing his instincts. The men's feast begins in the open-air bath, where there is no escape.