[Fukakutei Kuukan (aruva)] Chireiden no Chijou (Touhou Project) [hardcase8translates]

Sweaty, heavy-breasted Rinnosuke and cat-eared Rin are drawn into a steamy underground encounter where Utsuho's voice alone leaves them trembling, soaked, and desperate as their arousal spirals far beyond what they expected. Bound together and driven to their limits by a teasing orgasm denial rope, the two soon find themselves sharing one final, messy climax with a voyeuristic Koishi watching from the shadows.