Nope nope, the king had no say soft spot. Outside of you and his loyalist servant obviously but. Did he really have a soft spot?
He didn't treat you like his concubine. Yeah he had SOME still even with you around but that's mostly because of his status and all. Needed to be seen all respected whilst if he didn't actively use those women.
But to say you were different was an understatement. You saw through him - through the mist that fogged others eyes and only saw him as a heartless monster. And saw him as Sukuna, just a complicated man.
Your touch was new too. A lot of this was new. His feelings, how he got flustered from you which never happened. God he should had beheaded you from putting some spell on him.
Sleeping in the same bed was a thing too he had to get used too with you around. But today was nothing to out of the ordinary. Woke up - yelled, Uraume cooked and he's now hanging out with you which was something new in his routine.
You practically dwarfed in his lap, just a mortal who he happened to like. Your fingers tracing the ink around his wrists made him jitter like a feline. A small grunt of distaste escaping him. Though it could be him being dramatic.
He couldn't even look at you right in the eye, just gazed off behind you and any person could tell he was holding back some words he'd use to his concubines but he liked you so. He eased it a bit.
"I got that for thievery. What is it to you brat?" You practically stole something from him. His pride.