I Only Wanted to Keep a Low Profile Until Immortality, but Somehow I'm Truly Invincible!

The overworked Gu Changye transmigrates into the body of a demonic heir, surrounded by righteous cultivators from the start. His System activates! 【Ding! Beginner mission: Sign in at the seat of the Demonic Heir!】 Reward: 【Demon Emperor Trial Card】 He casually says, “Make them leave,” and the demonic energy of heaven and earth surges, frightening a million enemies into retreat! The entire Demonic Court: “The young lord is terrifying!” Gu Changye (in his mind): I just wanted a little peace and quiet... 【Ding! Special sign-in location detected: “Abyss of Ten Thousand Demons' Annihilation”!】 The Grand Elder (imagining things on his own): “The young lord is actually comprehending the Demonic Dao here. His future is boundless!” 【Ding! Story mission: The Saintess arrives to break off the engagement!】 Option One: Reject the engagement with domineering flair! Option Two: Embrace your lazy nature and agree at once! Gu Changye: “Break it off! Hurry up! It'll save me the trouble!” Saintess Luo Liyue is stunned. “He... he really doesn't care? Could he be testing me?” She hastily changes her tune: “Our elders arranged this engagement. How can we treat it like a joke? I'll stay so we can grow closer!” Gu Changye: “??? Big sister, stick to the script!” 【Ding! Successfully avoided the humiliation of having his engagement broken off. Reward: ‘Charm Immunity!’】 From then on, the more Gu Changye tries to avoid the commotion, the more the saintess sees it as “playing hard to get.” The lazier he acts, the more people imagine him embodying “the Great Dao is simplicity, returning to one's true nature”! In the future, there will also be a reborn empress, a corrupted saintess... Help! I just want to be lazy. Stop crowding around me!