The Underworld is the realm of Maldeca and the place where books with the highest level of youth protection are kept.
In Maldeca's own words, the Underworld is not meant to be a "prison for unwanted texts", but a sanctuary that empowers people to embrace their little sins in peace, without hurting anyone.
Books which are located in the Underworld will not be shown while browsing books in the Overworld, but they can still be found in their author's profiles.
Our image filter, which usually blurs NSFW cover images, is not active in the Underworld.