The hero died, but he was reborn as an adorable loli succubus. After her rebirth, she inexplicably acquired a series of identities—the Demon King's heir, the reborn hero, and the Abyss's agent. Thus, this world, which should have been rife with undercurrents, began to take a strange turn because of her presence. "That hero is so annoying! Why does he always get in our way?... My dear daughter, can you help me think of a solution?" (I am the hero) "Hero, regarding the failure of this operation, I suspect there's a traitor among us." (The traitor is here) "As expected of [Shinohara Yuuki]..."