15ID-063 - Futanari Shoujo Sakura Nana

The way her mind is completely overtaken by the pleasure of ejaculation, against her own will, really comes through throughout the whole film. The scene where she's begging her teacher to stop while he's hitting it from behind is incredibly erotic. Even after she collapses on the floor, the way a massive amount of cum sprays out like urine from her penis—that 'foreign object' sensation was just perfect.