Grinnerverse is the name given to a fictional universe of tickle-related stories created by TickleScenes. The stories are posted on Deviantart and have the characteristic of being placed in the same fictional setting. All the stories are linked, to a greater or lesser extent, by the influence of Grinner, a mysterious creature who exerts his power through tickling.
History of the Grinnerverse
Past
According to “The Curse of the Grinner,” Grinner was a demon who, in Earth’s distant past, took possession of human beings through expressions of joy, primarily laughter, using this ability to spread chaos and destruction.
Grinner was exorcised and imprisoned in the body of animals in a forbidden valley so that he could not infect people through laughter.
An unfortunate female hunter  ended up a prisoner in the cave in which the monster was imprisoned, and Grinner, by exploiting the abilities of some animals, was able to force the woman to laugh through tickling, thus being able to break free and return to haunt the world.
Present
In “The Silent Experiment,” Professor Connors carries out experiments on the human body’s response to tickling in order to obtain data to make innovative drugs. Her experiments require the participation of victims forced to resist tickling with all their might, apparently out of the scientist’s sadistic desire to see them suffer.
Future
In “In Space No One Can Hear Them Laugh” two astronauts are at the mercy of the onboard computer, GRINNER, which intends to take over the spaceship. A struggle for survival begins for the two unfortunates, who must try with all their might to resist the ruthless tickling of the artificial intelligence in order to save their lives.