Reincarnated and Kidnapped by the Demon Lord to Become an Experimental Toy

Zhang Ziye transmigrates to another world, only to be intercepted by Lilith, the Abyssal Demon King, along the way and transformed into a stunningly beautiful girl. The Demon King names him "Aivilia." Amid unbearable humiliation and pain, he awakens the "Chaos Core," which can devour all things. To survive, she puts on a mask of obedience, going from the Demon King's "test subject" to her "personal maid" as she struggles to stay alive amid a vortex of power struggles.