[Touken Ranbu] Auntie Is a Sword Immortal

I transmigrated into the world of Jian San and became the Seventh Young Master of the Cangjian Manor. That would have been bad enough, but after barely surviving the An-Shi Rebellion, I somehow got recruited by a cultivation sect... Good grief, the sect is called Qionghua?! (My life is over.jpg) Well, fine. Since my big brother has already given the word, there's no refusing now. I clung to my fellow disciple Xiao Ziying's coattails and cultivated an immortal body. When I came out of seclusion, I discovered... Good grief, Xiao Ziying had become Ziyin Zhenren and taken on a disciple named Baili Tusu?! (My life is over.jpg) I registered with Tianyong City, and guiding (teasing) my two martial nephews became a bit of fun... I would occasionally keep my fellow disciple company (play pranks on him) while he grieved for his lost student, and occasionally go into seclusion. Hundreds of years flew by. I thought I'd spend my endless life like that, until one day, after emerging from seclusion... Good grief, what the heck is the Time Administration? And what the heck are Sword Warriors? I only went into seclusion. How did the whole world change?! I consider myself all-knowing and all-powerful, except that I'm no good at space-time magic (then how can you call yourself all-knowing and all-powerful?!). With the Time Administration promising to help me get home after I save the world, I set out to save (destroy) the world with my Honmaru... Just kidding! First, let's save this dark Honmaru! 1. Everyone is out of character, and I've made up a mountain of details. If you don't like that, please click the top-right corner and leave. 2. Feedback is welcome, but no malicious attacks. The author is sensitive, thanks. 3. All characters are paired with the Master (including familial, platonic, and romantic relationships). Canon pairings may be broken up. This is a Mary Sue story, thanks. Please pay attention to these three points. If they upset you, I won't be held responsible. Thanks!