Well, from what I've heard, 'Are you here to kill' manhwa might have a dark and thrilling plot with unexpected twists and turns. But that's all I know for now.
It could be a result of a complex web of plot developments and character decisions. Maybe there were unforeseen circumstances or hidden motives that led to this point.
The full 12 chapters can be found in the search results provided. According to the contents of document [2] and document [10], it can be concluded that the 12 chapters of the free chapter are a novel written by the author, Half Cigarette Butt. This novel described Ye Jiahe's most experienced routine, Ji Yisa's routine. Ji Yizai set up traps one after another, and Ye Jiahe jumped into them one by one.