Okay I decided just to delete all of my original description so that it's more cohesive.
Original video:
http://www.nicovideo.jp/watch/sm13129889
Creator: Shuujin-p
Singers: Len and Rin Kagamine, Valshe
Translator: Tomo
Subtitles: Ryer
Romaji Lyrics:
www.romaji-lyrics-to-japanese-songs.blogspot.com
OR go here:
http://sarahfiction.deviantart.com/art/Chivalry-Romaji-Lyrics-275664134
Why this is not related to the Story of Evil series:
I'm having a very hard time finding information on this, but this is what I know so far. This is not made by Mothy, the creator of the Story of Evil series, this is created by Shuujin-P who has this series called the Prisoner Series. More information of that is in this link:
http://vocaloid.wikia.com/wiki/Prisoner_Series. Although Chivalry is not listed as part of the series, another vocaloid translator I was working with found information that it was part of the series, but is not directly connected to the story being told with it. So it's kind of like a side story. At the moment I don't have the link anymore where this information was at, though I'm still looking around for it. I really apologize, I still have a long way to go with my Japanese, I'm trying my best.
And I know many of you are asking "Well it says there is a sequel at the end of the video so where is it?????" I don't think there is supposed to be a sequel. The words at the end "It's likely to be talked about with another story" might be referencing more in the universe of this vocaloid song. Where the people might retell the story of their fallen country differently than how this song tells it. Basically the truth verses history. All in all it is very vague. If there is ever a sequel I promise I'll put up a link. I'd like a sequel as much as the next person, believe me!
I know many of you will still look at this and be like "Oh! That means that this one is the retelling of the Story of Evil!" or "It's so close to Story of Evil, it should be an alternate version!" Really you are generalizing this video very much to make it fit into the Story of Evil universe. Yes, Rin is the ruler, yes, technically, Len is a "servant" to Rin (more of a knight obviously), yes, Rin is supposed to be executed and Len prevents that. But we are obviously avoiding other characteristics of this video that make it it's own story. Rin's character is completely different from Story of Evil Rin. Is she the tyrant that her whole country is rebelling against? Obviously not, she's a beloved ruler that will do anything to protect her country from a situation she probably did not cause. There is also Len, who is directly confronting people instead of tricking everyone to save Rin. The relationship between them is also different where in Story of Evil, they are siblings who were separated for an amount of time, in Chivalry, they are not siblings and get to grow up together (there is not solid proof they aren't siblings but I doubt a prince would be allowed to be a common soldier or not also be a part of the execution/punishment). I also get the feeling their relationship is more romantic in Chivalry. Bottom line for both Story of Evil and Chivalry is Len and Rin's devotion to each other. And another difference is the fact that Len and Rin both actually make it out of the video alive. If they were really trying to be an alternate version, it would be a lot closer to the original story and probably would've included the other important characters in Story of Evil like Kaito, Meiko, and Miku and no just briefly showing their faces in Chivalry only tells us that Len knew them. I could go on but youtube is telling me my description is too long.
The bottom line is, Shuujin-P obviously was not trying to make this related to Story of Evil, no matter how many similarities you would like to pull from the video.
If you've managed to read this far you might be asking, "Why do you even care? Just don't read the comments!" And yeah you're right, why should I care? I...