Sad flower rape - brother and sister (two) caught in a trap!

Shinichi and Megumi are a close brother-in-law. Shinichi is bullied by Kazu and Teru, who demand that he take a naked photo of Megumi. As punishment for Shinichi who can't do that, a gag and a vibrator are inserted into her anus, and Megumi is tied down in front of Shinichi, who can't resist...