(sometimes referred to as "Eng's Demon Harem" or similar variants). Overview: Eng He Who Vowed to Create a Demon Harem Fantasy, Isekai, Harem, Action, R18/Mature.
The story is set in the year 1887, in a world where humanity has been under siege by demonic invaders from hell.
The Protagonist's Quest
At its core, the story follows a protagonist who, driven by either past trauma, a quest for power, or a unique destiny, makes a solemn vow: to unite the various factions of the demon realm by bringing their most powerful female leaders into his inner circle.
DLsite: A major hub for indie Japanese games of this genre, where many Avantgarde titles are hosted.
Progression Fantasy: Watching the main character grow from a vulnerable state to a powerhouse capable of standing among demon lords. Why the "ENG" Search is Trending
This is not a title but a search query typed into Google by someone hoping to find a story where the male lead swears an oath to build a harem of demonic women.
