Perhaps you missed the first episode where he decides whether or not to kill her. For all his white knight talk he is an emotionless assassin who won't think twice if he decides to fulfil the mission his leader gave him.
Holy mother of timeskips. A week condensed into a less than a second transition. Not even time for a shoddily put together training montage, huh?
As a LN reader, they were jarring af. But it's still looking fairly good.