Death sex/lust duet.
This story reminds me of what people should do when faced with a threat that is infinitely beyond their own existence. Death may be the best way. It's very novel, this kind of description is hard for me to think of...
Very good, this tone reminds me of some romance novels from hundreds of years ago. Chrollo's contact with the heroine made her completely let go of the past and embark on a new journey. Even if it is a romantic relationship, it can still make people feel happy, especially the heroine's gratitude to Chrollo at the end, which is pure and sincere. I love so much.