When the world walls of various worlds are broken by the turbulence of time and space, time travel, world line fusion, etc. Are all small things that happen every day.
A paralyzed girl accidentally fuses her spirit base and falls in love with the thousand-year-old fusangshen.
When miserable monsters were worshiped as gods and went to destroy ghosts during the Taisho period
When the silver chain that tightly locks the gods meets the prince and the god of war
...
World Consciousnesses: We are tired, please take your time and play.
[In general, the heroic spirits (including sub-servants) in FGO meet the protagonists from other worlds, and some CPs will be broken down]
(The characters may be OOC, after all, they are a fusion of different characters, please forgive me)
Chapters 1 and 2 are not well written and can be skipped without much impact.
Intention: See the warmth and coldness of the world