
This is just a theory but I think the male leads are incapable of killing each other. Or their obsession with Crochetta is so intense that they don't care about anyone else.
if you think about it, Ethian has the means and time to kill Roger and Arnold but he hasnt done so, same goes vice versa. Roger was just within killing point of Ethian and did nothing. There's always *something* that stops them.
Some ppl might bring up Ethian causing the fire, but in Chapter 51 they make it clear that the plan was only to separate Roger and Crochetta. (Also they hired basic mercs for a legendary swordsman lol yeah the intent was never to kill)

The world building of this story is set up so that Crochetta is doomed to fail, so she's just trying to go against the current in her own way.
Running away with Roger? Really? Running from the guy who literally set his house on fire, killed his mom, and has an entire army + shadow mercenaries at his control? Setting bro up to get killed and then Crochetta would get confined just like she is now but just faster.
Staying with Roger even though she was explicitly told if she stayed with him he would be brutally murdered??????
Folks theres no incest it's just a rumor Albert's dad and friend made up so that others (especially Albert because he's next) wouldn't fall in love with Asha.