Someone sent this my way today:

    Catalog ID:
               LDC35150
      Features:
               CAV/CC/CX
        Studio:
               PIOA:Pioneer Animation
        Genre:
               Anime
         Price:
               39.98
    Street Date:
               JUL 29, 1997
         Year:
               1996
  Running Time:
               50 minutes
        Rating:
               NR
       Starring:
      Summary:
               Makoto is the most popular boyin his high school because
               he excels at everything he touches. All the girls adore him
               and, in fact, everyone loves Makoto except Katsuhiko
               Jinnai. Jinnai finds Makoto's excellence frustrating and
               infuriating because everything Jinnai does, Makoto does just
               a little bit better. Nanami, Jinnai's younger sister, is
thrilled
               when she gets the chance to help Makoto set up an
               elaborate science project. Jinnai sees his chance to ruin
               Makoto by wrecking the experiment, but his sabotage
               produces unexpected results: the room is filled with
               unearthly light, there's an explosion and Makoto, Nanami,
               Jinnai and Mr. Fujisawa, a history teacher, are sucked into
               a different dimension, a strange world known as El-Hazard!

I have confirmed this.
;-)