[FGO Anko] Can a Master with 13 Sanity Save Humanity?

An Anko story. Every choice the dice goddess makes has meaning. I'll do my best to make it all work (stares into the distance).

Before you read:

1. I want to run a Pink Team, so don't complain about it.

2. This is a BL story, and some Servants are male, such as Arthur and Nero.

3. Characters may be out of character, the plot may go wild, and there are lots of headcanons. I like skipping through games, so I'm currently replaying the main story.

Theme: Save the world