Big-assed schoolgirls on their way home from club activities try a game of vibrators and fail, resulting in raw creampie

On their way home from club activities, some big-bottomed high school girls (Yume Rika, Minami Tsubasa, Toumi Kanata) get picked up and try out a game of "Wall-Ass Style Vibrator Challenge", but the extra-thick vibrator makes them squirt and they get creampied raw!