ACCEL WORLD, Volume 1,Chapter 1(12)
Hiding his flesh body in the toilet and wanting to avoid other eyes even in the virtual world, he started climbing the stairs carved into the tree that was his destination. The higher he climbed, the less popular the games. After passing baseball, basketball, golf, and tennis, and even ignoring the Ping-Pong floor, he finally arrived at the virtual squash corner.
There wasn’t a single student in the room. The reason for the floor’s lack of popularity was clear. Squash is sort of like tennis, but you hit the ball with a racquet in a space enclosed from top to bottom and on all sides by hard walls. The ball bounces back, and the player silently returns it over and over. It was a thoroughly lonely sport.