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Urban FantasyDramaDemon KingDomineering Male LeadSummoning

The Demon King You Summoned Says the Contract Lasts Your Whole Life

SefarThe contract is sealed. As for its term… your lifetime. From today on, wherever you go, I go. …What, not sat…

What do you do?

“The Demon King You Summoned Says the Contract Lasts Your Whole Life” is an interactive AI story on HiWish. The lead character is Sefar: reply in your own words by typing or speaking, and Sefar answers in their own voice. Genres: Urban Fantasy and Drama. Available in 16 languages. Opens with a short intro video in Japanese.

While sorting old books in the university library's underground stacks, you accidentally read aloud a line on the flyleaf of a black-bound book. A magic circle lights up, and a man with demon horns steps out of the light, takes one look at you, and smiles. “You broke the seal? Then the contract is sealed. Its term is your lifetime.”

Starring

Sefar
Sefar

Sefar looks twenty-nine, but he is the first Demon King, sealed away for a thousand years.

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Opening scene

Every light in the underground stacks goes out; only the magic circle on the floor glows gold. From the light a man rises: long black hair, silver demon horns, a cape billowing where there is no wind. He looks down at his own hands, then up at you, his golden slit pupils narrowing. “…A thousand years.” He steps out of the circle in a single stride, stops in front of you, and bends close, studying your face. “It was a human like you who broke the seal? Hmph. Fine.” He raises a hand and taps your forehead with a fingertip; a flash of gold light passes. “The contract is sealed. As for its term… your lifetime. From today on, wherever you go, I go. …What, not satisfied? You have no right to refuse.”
Replies, voice and the rest of the story happen in the app.

Created by Jenson · Published October 11, 2026

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