Ho :s sorry, the game started automatically on his route and I couldn't find a way to start on Nail's route :s I jumped from Dimitri to Neil by choosing the chapter 25 so I thought that I would have the request again :s
Oops, my bad, seems this version got uploaded with a save file I forgot to delete. If you wanted to restart, all you'd have to do is go to your WWW > Save folder and delete all of those files in there. But that's if you want to start over, you don't need to.