Before she knew it, Akari had become her brother-in-law's sex slave. When her insensitive brother wasn't looking, her brother-in-law Tsuyoshi forced her to do whatever he wanted with her. He tortured her with a vibrator under the dinner table while they were having a family dinner, and had chilling sex right next to her husband as he slept. Akari was frightened when her husband went on a business trip. Tsuyoshi's rampage accelerated, and he called his friends over to indulge in a wild orgy.