Grimmification

Grimmification is a phenomenon that exists within the setting of Lust Grimm and LustGrimm Again.

Overview
Men who are dragged into the world of the book are hunted down by succubi to be drained of life energy. When a man is completely drained, he undergoes Grimmification, which transforms him into a fixture within the story. He typically transforms into some sort of animal, but it is implied that some turn into inanimate objects without thought or agency, designed to simply be there for decoration.