**Chapter 3: Descent into Darkness**

Nozomi's cries grew louder, and Rin's eyes darted towards Saki once more, her anxiety spiking. She knew she had to silence Nozomi before Saki noticed. With a swift motion, Rin flipped Nozomi over onto her stomach, pressing her face into the pillow. Nozomi's muffled screams were barely audible as she bit into the fabric, her body trembling with effort. Rin positioned herself behind Nozomi, her hands grasping Nozomi's hips as she continued to rub their vaginas together. The friction was intense, and Nozomi's body began to shake violently. Rin could feel Nozomi's muscles tensing, her body trying to push away from the pain, but Rin held tight. Nozomi's attempts to stifle her cries were evident, her face contorted in a mixture of pain and fear. Her body began to sweat, and her breathing grew ragged. Rin could feel Nozomi's vagina starting to bleed, the friction causing tiny tears in her delicate skin. Nozomi's muffled screams grew louder, her voice cracking with pain. As Rin continued to move against Nozomi, she felt her own tension building, her frustration and anger boiling over. She was no longer thinking about anything except her own release. Nozomi's pain and fear only seemed to fuel her desire, her body moving harder and faster against Nozomi's. Nozomi's body began to tremble uncontrollably, her legs shaking beneath her. Rin could feel her own climax approaching, her body tensing in anticipation. She moved harder, her hands digging into Nozomi's hips as she sought to relieve her own tension. The sound of Nozomi's muffled screams and the rustling of the pillow filled the air, a stark contrast to Saki's calm, engrossed expression as she read her book. Rin was lost in her own world, a world of pain and desire, where nothing else mattered except her own satisfaction. As Rin finally reached her climax, she felt a rush of relief wash over her, her body relaxing as she released her tension. Nozomi's body lay still beneath her, her face buried in the pillow as she struggled to catch her breath. Rin lay still, her body pressed against Nozomi's, her chest heaving with exertion. For a moment, the two girls lay there, the only sound the quiet rustling of the pillow and Saki's turning of pages. Then, Rin slowly pulled away, her eyes fixed on Nozomi's battered form as she struggled to come to terms with what she had just done.