You have to watch this episode all the way to the end, especially to see Horikawa Kunihiro's change and the difficult decision Izuminokami Kanesada has to make because of it. This episode also raises an interesting question: does protecting history mean you can never change a single person's fate? We see many innocent people lose their lives, and they're all part of history. Even if the major historical events remain the same, is that really what it means to protect history? These are the kinds of thought provoking questions this anime leaves you with.