This version is the Rasmeg Duo's version and no the original Megumi version that you hear on the opening. It is an amazing duet rendition by a pianist called Rasmus as well as the original Megumi. If you haven't listened to it, I suggest you do so. That's why it will sound slightly different and in a different key to the original opening. Having said that, the key is so awkward. I don't even know what it is...E Minor? Anyway lots of black keys and hand positions which I'm not used to. Took quite a few takes to get somewhere. The anime itself...well I wouldn't say it's anything special. It's something to pass time. I do like the colourful opening though haha.