Stardome Railway: Change of Destiny

[Purely imagining, I don't quite follow the plot, there may be some things that I don't understand, please forgive me, after all, this is my first time writing a fanfic] [Single female protagonist stream, please don't read if you mind] The birth and fall of the Star God, the collapse of Cangcheng, the establishment of the Five Xiaos on the Cloud, the sudden chaos... They are not the only ones behind you, there is also me. I will accompany you to the end of the story. "Why do you think you can change your destiny? You know the price." "Do you need a reason to change your destiny?" "You know what the future will be like, why don't you let it come true?" "Because all creatures in this universe should not have such a fate." "I understand, I wish you success." "Then can I always call you sir?" "Sir, what is that?" "Sir, teach me how to practice swordsmanship, for revenge." "Sir, that sword was broken by me." "Sir, I have become the swordsman." "Sir, Yunshang Wuxiao has been established." "I said, you still have me behind you." Chang Sheng, a life form that has appeared since the birth of the universe, possesses the power of the Star God level for all destiny paths. He wants to change destiny, but his ability is limited and he can only change the destiny of a few people. But he will try his best to change the destiny. If he does it knowing that it cannot be done, will the result be regret? He doesn't believe it, he wants to try it.