Good remix and definatley feels fitting to the extra stage theme remix you did. It makes flandre not as scary as an extra boss and makes it seem more like playtime with the younger sister.

Now this is what I think when I think of the EOSD extra because of the build up you veg for 1: a awesome patchy fight and then 2: the younger scarlet sister

It's a good build up and you captured it really well in this!

Wow, for me this breathes a new sense of life into a song that is constantly played andost people recognise but this is a step up from the bog standard arrangement. Good job on this! すごい! (sugoi)