Dennou Sentai: Lavian Three

In 1999, a global computer network was assembled, allowing unprecedented transportation speed to different locations on the Earth through virtual reality. But it also opened virtual portals to another dimensions. The ruler of one of them, the magical empire Lemuria, concocted a plan to use the computer's energy in order to destroy the Earth. Luckily, not everyone in Lemuria shared his views, including a beautiful girl named Lares, who contacted a group of computer-loving high-school girls in Japan, and turned them into super-heroines who fight in cyberspace!
[From Moby Games]