Notice: everything here is non-canon including the character back story aka running on trust me bro and girl as I don't go heavy deep in the FGO lore or any other then Tensura or Genshin so again trust me bro and girl…
A what if story before the reincarnation even between a young high school girl and an early middle age man.…
throw in a medival and fantasy type of world by unknown reason now with no anything on hand one slime, one demi god and one human have to work together to survive here…
the event following after Rimuru save his past self Satoru Mikami…