In the heat of midsummer, Hisashi, who has not been able to find a job, is shunned by his family and is pent up. Meanwhile, Hisashi's love for his sister-in-law Ichika grows stronger, and he ends up raping her. Ichika resists, but Kokoro wavers when Hisashi says "I love you." And she becomes immersed in a forbidden affair... On a tropical night, Ichika is covered in sweat and is consumed with passion.