My son's girlfriend, Chan Yota, is a muscle-loving fitness enthusiast he met at the gym. They started dating because she was attracted to his lean yet muscular body and kind nature. Today, they are spending their time working out together, sweating and flexing their muscles. As they get more aroused by each other's sweat and physique, Chan Yota can't help but feel increasingly turned on...

息子の彼女のちゃんよたは格闘技好きの筋トレ女子で息子とはジムで出会った。息子とは見た目が凸凹カップルなのだが息子の細マッチョボディと優しさに惹かれて付き合い始めたと言う筋肉フェチ。そんな2人は今日も部屋で汗をかきながら筋トレして過ごしているのだが汗と筋肉に欲情したちゃんよたがムラムラしてしまい…。