Firefly: Do I Have to Fight in the Holy Grail War Too?

[Honkai: Star Rail] + [Fate] + [protagonist: Stelle] + [one heroine: Firefly] + [Stelle and Firefly get sweet moments together]

“An omnipotent wish-granting machine that can make any wish come true? Does something like that really exist?”

“I don't know, but that's what Elio's script says. He said that if we leave things alone, something terrible will happen to this galaxy.”

“And the script also says that only Stelle and Firefly can take care of it.”

Following Elio's prophecy, Stelle and Firefly head to a planet in a remote corner of the galaxy, where a Holy Grail War is underway. Seven Masters and seven Heroic Spirits are locked in a fight to the death.

Stelle: “I'll win this Holy Grail War and claim the omnipotent wish-granting machine. I'll use it to cure Firefly's entropy loss syndrome.”

Stelle and Firefly each become a Master and summon their own Servant. But why are the Servants they summoned... people they know?

At the Clock Tower, Waver looks grave. “This Holy Grail War was abnormal from the very beginning.”

Reines: “Then answer me this: after all these years, has there ever been a normal Holy Grail War?”

(After seeing the news about the second crossover, I was so excited that I immediately decided to write this fanfic. I've been a Fate fan for ten years and have played Honkai: Star Rail since launch, so I know my stuff. The Fate lore won't get too complicated, and I'll explain everything that needs explaining, so even if you haven't experienced Fate, you can still enjoy the story!)