After a series of failures at work and in his personal life, Kakeru is exhausted both physically and mentally. He throws everything away and arrives at a rundown hot spring inn. There he meets a married woman, Maki, and they hit it off, so they decide to spend the night together... Forgetting the ties of everyday life, they indulge in pleasure day and night, immersed in their fleeting rendezvous. In the steam of the hot spring, Maki is covered in sweat and revels in their carnal desires, and Kakeru is so obsessed with her that he penetrates her hot, wet hole deep and climaxes over and over again...