Mountain climbing beauty forced to have sex until she dies - Mayu Sato, Yuka Shirai - APNS-077

Mayu Sato and Yuka Shirai have been childhood friends and besties. On their way back from a short trip, they decide to walk down the mountain, but get lost and become very tired. Meanwhile, the owner of the mountain villa who protects them, Taichi, is actually a rapist...