No System + Western fantasy + multiple losing heroines + emotional relationship-building + a few memes
The Descender: Quan Ming, a transmigrator from another world, must stop the angels and demon kings from having their way, or the world will be destroyed. He has no choice but to turn them into losing heroines.
The Demon Kings: Get the Descender for themselves, then take him by force.
The Angels: Descender, for the sake of world peace, you can't choose those demon kings.
In the end, Quan Ming's choice is... “You can all just be my losing heroines. I'm naturally suspicious, and I don't dare risk my life trusting you angels and demon kings.”
The Descender knows puppet-double magic. He can create multiple versions of himself, each with a different appearance: male or female, human or beastfolk. These doubles become Quan Ming's trump cards.
Come on, author.