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…
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…
A what if story before the reincarnation even between a young high school girl and an early middle age man.…
the event following after Rimuru save his past self Satoru Mikami…