Anime Crossover: The Vacation Worlds Are Cursed!

Warning: potential triggers

The heroine is sweet on the outside but dark within. She's not a good person, and she's completely crazy! If that bothers you, run!

The heroine in the vacation worlds is dark, while the heroine in the past-arc stories is a bit of a naive sweetheart. The usual pattern is one story in a vacation world, then a past arc, then another vacation world.

I'm a notorious procrastinator. I won't abandon the story, but updates may stop without warning. If you don't like waiting for updates, let it build up for a while.

There will be lots of cameos from games, manga, and anime. Major guest characters will be noted in the title, so steer clear if any are deal-breakers for you.

There is a System, but it's not very capable, and there are pocket spaces such as Genshin Impact's Serenitea Pot, Touken Ranbu's citadel, and Onmyoji's courtyard.

There is no CP in principle. The heroine may interact with characters from games and anime, but characters in the mission worlds will either have unrequited feelings for her or none at all. There will be no mutual romance.

The heroine is set up as universally beloved, though I'm not sure how strong that aspect will be. It mostly depends on my mood. There will definitely be OOC moments, but I don't know how bad they'll be. If that bothers you, just don't read it.

If all that sounds fine, here's the synopsis.

A top-level mission pro, Feng, and her silly little System's extraordinary vacation adventures.

Feng: “So, System, please explain why the vacation world is such a disaster. Are you sure this is a vacation?”

System: “Host's blood pressure is too high. Activating rapid cooling mode.”

Feng, drenched with ice water: ...

“Forget it, let's leave it at that. Maybe it'll work after its next upgrade. It's junk, but what else am I supposed to do with it?”