The Hero and the Demon King Won't Go from Archrivals to Lovers, Will They?

"First Hero" Raven Mia: "An archenemy is an archenemy, you know. Archenemies can't become lovers. If you become lovers, you'll never be able to look your archenemy in the eyes honestly and say, 'I'm going to kill you' ever again... If you become lovers, all you can do is curl up together under the blankets at night... So archenemies can only be lovers... Oh, no, I mean, lovers can only be archenemies... Sorry, I mean... archenemies... Forget it, I'm done talking."

Demon King Vionne: "So what are we? Archenemies or lovers?"