Eririka Katagiri and Sora Shiina were a real life lesbian couple off camera. There was one film where Eririka and Sora fucked other girls while the other was forced to watch. In one of the scenes Shiina started crying while watching her girlfriend fucking another woman. Funny enough after they broke up Shiina started dating Aya Miyazaki one of the girls she fucked on camera. I dont know if they are still together.