Marshall Lee- The immortal Vampire King. Does what he wants, when he wants. Fionna- The human adventuress. Caring, brave, and smart, and maybe even a bit naiive. What happens when these two friends keep getting closer? Can the Vampire King learn to love this human girl without hurting her? Can Fionna leave herself vulnerable to his powers? But he'd never hurt her....right?

Enjoy this marshall lee and fionna fanfic \(^w^)/ (the title even gives me feels ;A; xD lol)

Fionna and Marshall Lee decide to become a couple. Awww. But the only way for that to happen is if she is a vampire?