[Misaki Yukihiro] Nikuhisyo Yukiko Volume 14 chapter 53

Office secretary Yukiko can't catch a break—what starts as another late night at the company spirals into a sweat-drenched encounter she never agreed to, her cries barely muffled as she's pinned and taken from behind. The real twist: her younger sister Yuka is watching it all unfold from the corner of the room, torn between horror and something far more complicated as her big sister comes undone again and again. With a bespectacled man calling the shots and both women pulled deeper into his grip, this volume layers office power dynamics, reluctant arousal, and sisterly rivalry into one escalating mess neither of them can walk away from.