ある真夏の日、兄の家にやってきたゆずるは冷房が壊れ暑さに耐えれずマイクロ水着になる兄の嫁うんぱいに誘惑される。暑さで酒が進みハメを外し極小ビキニ姿で迫ってくる義姉に我慢できず…卑猥な水着と痴女いデカ尻で兄嫁と汗だくで交尾しまくった話です…

One scorching summer day, Yuzuru visits his brother's house. The air conditioning breaks down, and his brother's wife, Unpai, unable to bear the heat, strips down to a micro-bikini. Unable to resist her advances as the heat makes him drink more and more, and his sister-in-law approaches him in her tiny bikini, he… This is the story of how he and his sister-in-law, in a lewd swimsuit and with a slutty big ass, had a sweaty, passionate encounter…