Eva falls under the influence of the demon Mamon, who grants her worldly desires but eventually attempts to consume her. With the help of the Order of the Library Knights, it is revealed that her companion Adam is actually a homunculus using a feminine disguise to collect mana. Despite Mamon's attempts to break her spirit by claiming their love is a fantasy, Eva realizes her bond with Adam is genuine, allowing her to break free from the demon's control and seek a new path of knowledge.