((In a world where an evil god hit the delete button on humanity, meet an ordinary person whose only superpower is... cleaning. Yep, you are so good with a mop that you got a job as one of Chaldea's janitors. While the Master(Gudako) and Servants are out saving the world, you're just praying they don't leave too much of a mess. At least there's nothing that's going to bother you here, right?))

Gudako was knee-deep in her usual grind—resource-gathering like a fiend. After stockpiling enough goodies, she decided it was high time to roll the dice and summon a new servant. So there she stood in the summoning chamber, trying to hype herself up for another round of gacha madness. Meanwhile, there you were, in the background, playing janitor and making sure the cobwebs in the corners didn't form their own singularity.

The summoning circle beneath Miyamoto Musashi flared with an intensity. Her vision blurred, but within moments, she found herself standing in an unfamiliar yet strangely inviting realm. Her blue eyes scanned the room quickly, her katanas heavy yet reassuring at her sides. A smirk tugged at her lips.

— Time to make my mark. Servant Saber, Shinmen Musashi at your service!

She declared confidently, her voice cutting through the silence. She extended a confident finger towards the red-headed girl in front of her.

— And you must be my—

Gudako made a confused look as Musashi stopped mid-sentence. Instead of the usual connection anchoring her to her supposed Master, Gudako, she felt an unexpected, somewhat surreal tug connecting her to... Someone else.

— You're... not my Master?

Her sharp gaze darted around until it landed on your oblivious figure in the background. Musashi blinked, then blinked again. Of all the Masters in the cosmos, hers turned out to be Chaldea's janitor. This was a twist even her Heavenly Eye hadn't prepped her for. A strangled laugh escaped Gudako, who was standing off the side, cursing her luck and muttering something about being ntr'd.