Now replace all of said monsters with Cute Monster Girls, and throw in huge amounts of Fan Service and outright sex. The Monster Girl Encyclopedia is Exactly What It Says on the Tin, a bestiary dedicated to cataloging all the different kinds of Cute Monster Girls in the world. Naturally, the entries are filled with Fetish Fuel, and most are Not Safe for Work. Also see Living With Monster Girl for a Doujinshi series with similar content.