The Efruumani System
The Efrumani system is the name given to the planetary system containing the Aathalworld of Efrumani, a habitable moon of the gas giant Myrskaan.
Efruumani is the only habitable world in the system, though it is a habitable moon of the system's only planet, Myrskaan, rather than a planet with its own orbit. It is tidally locked between the system's sun and Myrskaan at the Lagrange point between the two--something possible, but highly improbable. It has a large population of sentient life--the Samjati of Darkside and the Natari of Lightside--as well as two Aathal, Yrmuunthal and Boaathal, and two Thrones, Secrets and Truth, but no human life. The Investment of this world manifests in its regular auroras and the biogems that allow life on Efrumani to flourish by way of that light.
Efruumani has one moon, Atjakuu, which orbits its equator, perpendicular to Efrumani's orbit of its sun. This allows it to mark the passing of hours for the denizens of Efrumani, as the planet has no rotation to do so.
Myrskaan is the only true planet in this solar system, a gas giant of pale greens, and the parent-planet of Efrumani. It has no other major moons.
Efruumani's Star is a red, M-Class star with powerful, highly volatile solar flares. In any other system, these flares would have scoured Efruumani of its magnetic field and any life on it. Scholars believe that Efruumani's twin Aathal are responsible for the planet's stability in an otherwise improbable position between Myrskaan and the sun, as well as the regularity of the solar flares, and the habitability of both sides of the world despite what should be extremely harsh conditions for survival.
Efruumani's Congitive Reflection, more colloquially known as the "spirit realm", reflects the harshness of its world, with continents of violet ice and seas of red lava, an inverse of its Physical land masses and seas. It was given a few names by some educated enough to know what it was, but was rarely traveled save by a handful of individuals, and even then for a very short time.