The average middle-aged man, Arocles Odetta from Greece thinks what the Borgia are doing is wrong. He decides he needs to put an end to it. To do this, he needs to assassinate the leader, Nodenhime from Bulgaria.
Demon King Akashi Seijuro, he lives in the underworld, and he is looking for a queen, but first there must be concubines.
Kuroko Tetsuya, a male that looks like a female, a male who has been mistaken for a female his whole entire life has been chosen to become a concubine for the Demon King.
Inspired by "The Selection" by Kiera Cass (it's an amazing book to read).