King-Sized Roommate

King-Sized Roommate is a comedic NSFW visual novel about an incubus prince named Reinard who escaped his dark realm to live as a human corporate worker in Japan under the alias Kisaragi Rei. Three years of peaceful monotony are shattered when the Dark Lord himself—now calling himself Obsidian, King of Monsters—teleports into his tiny studio apartment, forcing the unlikely pair to become roommates. The game is a dating sim with gacha mechanics (cosmetic only, no pay-to-win) where players build relationships with summoned characters from different dimensions, unlock intimate scenes through friendship progression, and navigate the unfolding conflict between Rei's past and the Dark Lord's sudden arrival. Expect comedy, romance, transformation elements, and strategic character recruitment as the narrative expands.