A self-study room in a certain cram school. Girls are working hard for their exams. Thinking they might be taking a break, but no! Between study sessions, 12 female students start masturbating and convulse to orgasm! Is this stress relief from exam prep? Who would have thought they'd do something like this in a self-study room... Girls who are embarrassed by their sexual desires silently orgasm, twitching as they come! Some even wet themselves…
