Ten thousand years ago, I witnessed the destruction of a civilization, the shattering of memories, and the arrival of an end. At that time, I was powerless to stop it.

Fifty thousand years ago, I felt a familiar civilization, familiar things, and familiar people, but the memories that traveled through time were not in my mind. I watched as the end destroyed civilization once again, but I suddenly regretted it.

And now, the power to save everything, all the memories of the past, are within me. This time, I don't want to lose them again, nor can I lose them. I will grant your wishes and make this world beautiful again.

Sing joyfully, all things in the world, to welcome the death of your god, who will bring boundless beauty to this world. What, "you" refuse? No, no, no, you have no reason to refuse any of this, nor is there any room for negotiation.

(There may be some timeline confusion or inaccuracies, but the main content is correct. Please forgive any errors.)

On an ordinary morning, Kevin coser just stepped out of the house when his vision went dark. When he woke up again...

System: Congratulations, you have traveled through time.

Kevin coser:...Ah?

System: And your cosplay came true, and you became Kevin.

Kevin coser: cool～

System: The good news is that you didn’t travel to the Honkai Impact 3rd world.

Kevin coser: What about the bad news?

System: You can't go back to your original world. So...

Kevin coser:?

System: Come save the world with me!

Kevin coser: This is too sloppy!

All in all, it’s a story about a hapless kid who saves the world after his cosplay comes true.

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Pre-view reminder:

1. The person cosplaying is not Kevin himself, and I have never played Honkai Impact 3rd. My understanding of Kevin comes from Bilibili. Please forgive me for the imprecise settings.

2. Character ooc warning!

3. A self-inflicted work, Kevin COSER travels through time and space to curse back + Wen Ye + tutor, not involving Honkai Impact 3rd.