ずっと前から、そんな気がしてた。そんな顔で笑うなんて知らなかった。ボクの知らない表情、声、仕草。どれもキラキラ煌めいていて。それを見ていると、寂しいような、苦しいような、吐き気にも似た感覚が込み上げる。呼吸が、どんどん浅くなって。どうしようもなく胸が苦しくなって。だけど、不思議と。心の底から安心したんだ。気持ち良くなってくれてよかった。最愛の妻の不倫を観察し続けたボクが、目撃してしまった妻の裏顔。──────────妻のナオは、元カレの哲也と隠れて不倫をしている……そう思い込んでいる。だが本当は、彼に金を払い、妻を抱くように仕向けたのは夫のボクだ。部屋に仕掛けた隠しカメラの映像や、尾行先での密会風景。元カレの部屋で撮らせた生々しい映像を見るたび、ボクの奥底にある歪んだ欲望が満たされていく。そして今日、エスカレートする俺の願望を叶えるため、とある特別なプレイを提案した。今晩、「目隠し」をした彼女のすぐ傍に、ボクは息を潜め密かに潜伏する──

I'd had a feeling for a long time. I didn't know she could smile like that. Expressions, voice, gestures I'd never seen before. They all sparkled brightly. Watching them, a feeling of loneliness, pain, something akin to nausea welled up inside me. My breathing became shallower and shallower. My chest tightened uncontrollably. But strangely, I felt a deep sense of relief. I was glad she enjoyed it. I, who had been observing my beloved wife's infidelity, had witnessed her hidden side. ──────────I've always believed that my wife, Nao, is having a secret affair with her ex-boyfriend, Tetsuya. But the truth is, it was I, her husband, who paid him and arranged for him to sleep with my wife. The footage from the hidden camera I set up in the room, the scenes of their secret meetings that I followed them to. Every time I watch the raw footage I had filmed in her ex-boyfriend's room, the twisted desires deep inside me are satisfied. And today, in order to fulfill my escalating desires, I proposed a special game. Tonight, I will lie low and silent, hiding right beside her as she wears a blindfold.