SCOP-786 Suddenly the power goes out when his sister comes out of the shower, and the towel falls off! Because of the darkness, the older brother who was held tightly by the younger sister's naked body became fully erect! Terrified and excited, the two of them can't leave the room and rely on the light of a flashlight to have an inbreeding session! (SCOP-786 在妹妹剛洗完澡出來的時間突然停電，浴巾也就掉了！！因為一片漆黑被緊抓著的哥哥他因為妹妹裸體而全勃起狀態！恐怖又感到興奮而無法離開的二人倚賴手電筒的光線中出近親交配！！)