Eight-Legged Obsession
Read the storyTom is a 19 year old man with a fetish for monstergirls. He is obsessed with the lore of "The Monstergirl Encyclopedia" by Kenko Cross. He discovers a grimoire that contains a spell that when recited transforms a person into an stunningly beautoliful but evil female Arachne, a type of monstergirl whose body above the waist is a impossibly beautiful woman while below the waist her body seamlessly is a gigantic black widow spider complete with mandibles, a cephlothorax, 8 spider eyes, spider legs, and spinerettes. Tom realizing what the spell does eagerly reads it and begins transforming both physically and mentally into an Arachnr monstergirl with an all encompassing need to fuck humans before consuming them with her spider half.