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The protagonist wakes up inside the body of the Demon King in a fantasy world and sets out to help a persecuted goblin tribe, rebuilding a city and forging increasingly intimate relationships.
"The Demon King: Harem," developed and self-published by KAWAGUCHI, is a turn-based JRPG with visual novel and dating sim elements, released on July 23, 2026. The game places players in the role of a protagonist transported to a fantasy world who ends up inhabiting the body of the Demon King, forced to manage his daily affairs and assist the goblin tribe, led by the Goblin Queen, against an invasion by the human army. The gameplay structure combines turn-based combat with branching narratives and choices, while adult content revolves around themes including succubi and demons.
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