What if...

At the moment i'm in the camp of don't care, it needs more than two reincarnated deities in the mortal realm to gain my interest.

Genderbent incest

 

science fiction

 

I really like the general idea, But i hope that it can be more imaginative than that, like two immortals in the same world, with one of them weak, probably the MC who is now on a quest to regain immortality so that he/she can stop the other immortal who still has his/her powers but is trying to kill the mc. I could be a little bit like A new journey of an old soul from RRL, but with more focus on the advances of the enemy(Attacking Immortal) and more defenses from the weaker immortal.

Andur does a lot of these works on RRL
Like @gymzim said.

It's not really brothers and sister, but the relationship between two incompatible characters who are actually really compatible; Gods or simply strangers who meet by coincidence. His works are pretty repetitive though, as he has used the same characters for 4 novels? Using mostly the same combat system, and the way the characters interact with each other. His novels are amusing nonetheless. Give them a try.

 

I heard about it and read the reviews and other Andur stories, but the romance is...

 

Yeah, I hear its just the same story over and over again. I had wanted to read it at some point, but before i read anything, I take a look at the reviews.

Though some reviews are outliers, but multiple ones stated the same thing.,

 

The romance is 'sadistic' and pretty weird. I liked 'A new journey of an old soul' the mc has been reincarnated and is on a journey to defeat the enemy woooah. his/her his old friends are immortal who are trying to seek him out, either to exploit him or kills him etc. It's a good read, even if it's a female protag, with an interest in women.

Edit: I am such an idiot i already mentioned the story in a previous post, but my point still stands.