In the midsummer heat, Hisashi, who can't find a job, is frustrated by his family. Meanwhile, Hisashi, who is growing in love with his sister-in-law Ichika, ends up raping Ichika. Ichika resists, but Hisashi's words "I love you" shake her heart. And drowning in a forbidden affair... On a tropical night, Ichika's passion is drenched in sweat.