An idiot assassin deciding not to kill the target only to eventually fall in love.
The execution of this one is indeed quite good, but the trope is ancient. Despite all tries to make the story more complex and engaging, you highly likely won't find anything new here if you're already familiar with this type of story.
There are only 8 chapters here right now and I'm afraid I'm already getting tired of it.
Let's see where this is going, but I'll only return to this after (hopefully) stockpiling quite a few chapters.