Book of Nethoria

The world named "Nethoria" had faced a universal disaster called "Whitening" at the end of 2023. Because of "Whitening", the technologies and lives were retrograded. An organization "GROW" which had became underground organization after "Whitening" Became out of control and all the governments were dissolved. After centuries had passed, they came out to the surface once again to find the reason behind "Whitening".