Vampire and slime back in time [Rimuru X Luminous]

while fighting with chronoa, Rimuru asks Luminous to hold her down as he have figured out how to stop her rampage.
while Luminas held chronoa down, Rimuru, or more accurately, Raphael, started to entire her consciousness. but a fatal error happens, which leads both Remuru and Luminous to go back in time and in a state weaker than they were at.

2023/5/27. 1st place in "shizu"

I do not own any of the characters (unless I make an OC)
ok, so this's basically a Rimuru x Luminous story. with a lot of wholesomeness. I wanted one, but I couldn't find any good ones, so I chose to do it myself. unlike just about every other 'Rimuru goes back in time' fanfic (actually most tensura fanfics, even the nontime travel ones), where Rimuru is hella strong and is god. or that he went to another world and is almost at top of the power chain (most other world ones are after the end or after he became demon lord) this one would have both Rimuru and Luminous very weak, like way weaker than in the original. aka they are hardcore. and despite me wanting wholesome, it will be hella dark, compared to most other ones at least. why? cuz my mind is too fucked to make a wholesome thing. there must be pain and suffering. so deal with it.