Gacha System in the Honkai World

I woke up to find myself in Nagazora City during the Third Honkai Eruption-with a rather unreliable FGO summoning system in tow.

"Huh? I can transform into the Heroic Spirits I summon?"

"What? I have to strike a pose and shout 'Henshin!' when I transform? Are you going to hand me a transformation belt, too?"

"Wait, a ten-pull in one second, and all I get is Iron-Willed Training? You trash system! Give me back my Saint Quartz!"

As you can see, this is the story of someone armed with an FGO summoning system, striking Kamen Rider transformation poses as their adventure begins in the world of Honkai. (That's a lot of crossover ingredients. Let me know which worlds you'd like the protagonist to visit!) New author, new book-please show your support! I'll set up a reader group once we hit 500 bookmarks. (Humbly begging.)

Nagazora City → Demon Slayer: Kimetsu no Yaiba (current arc)