Xiao Chi's Great Zheng Era Adventure [Demon Slayer]

After dying suddenly from staying up all night, Mikasuki Chi transmigrates.

She arrives in Demon Slayer, the anime she'd just watched and the manga she'd just finished reading before she died.

And perhaps because she'd still been idling in Arknights before her death...

An Arknights System appears in her mind as her golden finger.

"I can do this! I can do this!"

"Next, I'll beat the stuffing out of the mochi head and stomp the steamed bun head!"

"Marry Big Brother, take down Muzan, and reach the peak of life!" (Ahem.)

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[Please note]

1. The pairing is with Big Brother.

2. The female lead uses a System from Arknights, a mobile game. If you haven't played it, you can read the author's notes, where I'll explain some game-related details.

3. The heroine grows over time and has a sarcastic streak. It may lean a little toward a leveling-up story...? This isn't a power fantasy, though I might make it one at the very end.

4. There are some personal takes and out-of-character moments. The timeline may be adjusted a little, but the broad strokes will stay the same.

5. --Of course, everyone survives!

6. I'll use all kinds of weird jokes and memes... (runs away)

7. If it's not your thing, please be gentle... I crave comments! Thank you!

Theme: Everyone survives--!