Its essentially about a girl who experiences things not everyday people can and a magician who appears to be not from this world. This OVA is a recollection of her memory as a child. The story is told so brilliantly and cleanly that I fell in love with this. Also the graphics are brilliant and so is the sound.
Please note that one needs to have a bit of sensitivity to truly appreciate this one (No offense to anyone). If you are looking for an anime with adrenaline rush or politics this is not fir you. Watch this with a peaceful mind and you will truly appreciate this.