Honkai Impact started when Kiana came to Honkai Academy

The wisdom of countless worlds has never found a way to end the collapse.
Civilization and collapse seem to have always been entangled in this way.
However, an accident made countless people see that tiny possibility.
Also in St. Freya, the genius eldest lady Kiana and the paramecium Kiana found that they had exchanged identities with another 'selves'.
The encounter between the two people across the world began to be played in front of everyone in the form of video.Gather the wisdom of all civilizations to find a possibility to defeat Honkai.
Paramecium: "The God-killing Armor in this world is so powerful."
Theresa: "Compared to Cecilia, I still did too poorly."
Otto: "The me in the other world betrayed Kallen's faith."
Leiden Meiyi: "Is it me who is so powerful?"
Kevin: "Have I beaten MEI?"
……
When everyone who watched the video suddenly looked back, knowing the future, the dawn of hope began to expand infinitely.
A few years later, the Herrscher of the End arrived.
Finally:? ? ?
[PS: This work will be mainly based on Honkai Academy, with some original and integrated plots added.If there are any mistakes, please correct me. 】