Read Chapter 129 of I, the Demon Lord, Am Being Targeted by My Female Disciples! only at Manhuarm MTL.

The author of this novel originally gave a full overview spoiler of the big ending secret of this story when he decided to drop this novel and don't continue, but then later deleted it when he decided to continue again xD according to that spoiler : >!Bai Qingling himself is the one who made the system, in the original timeline, he did not try to resolve all the misunderstanding with his disciples, junor sisters or Mu Xinlan and went to fight Mu Xinlan with the intention to intentionally fail and die by her, both to make it up to lying to her before and to help her achieve her dream of destroying he Demonic Physique he have.!< >!Meanwhile MC through Mu Xinlan's ability to see some vague future saw a reflection of the future, he saw how Mu Xinlan could not bring herself to kill MC but later in future at the very end the Otherwordly demon attack and kill everyone and only Mu Xinlan and MC are left, but they could not save anyone and MC could not work together with Mu Xinlan to defeat the enemy coz she never trusted him anymore and refuse to work with him. Mu Xinlan also saw part of this future, it's mentioned once that he saw a future where everyone gone but Bai Qingling is still there in some earlier chapter already.!!After this MC decide to change the future, so instead of giving up to die by Mu Xinlan he escaped back to Blood Kitchen, then tried to come up with a plan to change the future and decided the only way to defeat the enemy, is if he himself change and learn to Love the people around him more obviously and express his feeling, so he can resolve the misunderstanding between them and unit with everyone together so they can defeat the otherworld enemy and avoid the worst fate!!!So he used some Tier 10 Gu worm or something, sent his Soul into Earth to live a different life in a peaceful world and learn how to express himself better and have better emotional intelligence, then used his knowledge of the future he saw as well as his goal of spreading love to everyone around him to resolve misunderstanding and unite everyone together, to Create the Fake Game plot as well as the system to guide new self that grow up in earth to slowly go toward that goal and change the future for the better. !!the items and rewards from the system, is just items and treasure he already had, he just made this system to create a motivation and motive for himself when he is back from earth to go toward the correct path lol!< this spoiler chapter overview was later deleted by the author. but can still be found in some site that copied it beforehand lol it is possible that some of this change ofc since author deleted it and free to change stuff.