失禁的日本女学生在更衣室偷偷撒尿，然后把酸奶抹在她的阴户上

this girl is a Japanese student and is incontinent so she decides to secretly get away from her friends during recess and piss in the shower of the women's locker room and then clean it with her panties. In the end she takes her yogurt and instead of eating it she decides to spread it on her pussy and piss on it