Haruyuki is an overweight boy who recently entered middle school. He has problems typical for a fat child: low self-esteem, bullying from classmates, and so on. His only outlet is the virtual world, where the clumsy real body does not interfere with the quick reaction of the brain. He plays squash in the school network, and his incredible results are noticed by the first beauty of the school, Kuroyukihime. She invites Haruyuki to discover another world, where the speed of thought and the will to fight determine everything.