The incredible opening song of an incredible anime, Todo Izumi's A-shi-ta no Nadja*! If you have any interest in shoujo (although the genre may be considered a little old-timey nowadays...), I highly recommend it and all of its wonderful music.
*...I had to write 明日 as "a-shi-ta" to avoid setting off the censor. Sorry, friends; I can't help what the word for "tomorrow" is in Japanese.
I like this because it reminds me of an intro to an old 80s cartoon. I haven't heard any new music from Ultra Sheriff in a long time, though. I wish they'd make more.