I Transmigrated Into Demon King of Harem?

I, the Saint, will never give myself up to you. I will never give myself up to you, the Demon King. Whether it’s a strange drug, a special treatment, or a hypnosis, use it all on me!
I, Lucius, the Demon King, am determined to change my fate as a villain and be destroyed! This is why you saint, dwarf Princess, Elf, and Valkyrie no longer need to fight against me!