While on her way home, the girl from the all-girls school couldn't suppress her sexual desire any longer. After finishing her business in the toilet stall, she stealthily started masturbating with her fingers, making slurping sounds. A tiny camera was secretly installed to covertly film the genuine masturbation of an amateur schoolgirl. It seems that even the girl who usually appears serious lets her private parts get all messy and ends up climaxing in the toilet...