The other reviewer is very helpful in stating what the story is about, which I agree with the rating of 5 stars. So instead, I shall talk about the actual product in question:
The picture you see in the Amazon listing is a cardboard slipcase and the spine of the cardboard slipcase as-well, and what yo will find inside is a sturdy casing with a large piece of artwork (also present on the dvd version - as this part is the only thing the same in both versions) covering both front and back of the inner casing. When you go to open it up there is no seal holding A and B together so it should just unfold like a book. Inside you are presented with 2 Blu-ray discs. The first one is a Blue disc which looks very nice which contains episodes 1 to 8 and Bonus content. The second disc is a Green disc featuring episodes 9 to 13. Both discs sit at either side of the packaging ontop of a yellow background with white rukh featured upon it.
When you put the blu-ray into your player (PS4,PS3, Blu-ray player etc.) it will load up asking you either French or English - both feature 2 trailers at the beginning once you select your language (trailers are skipable, and the trailers for each language are different). It is dubbed in French, English and Japanese. There are subtitles for all of these options as-well - the menu screen is also very nice as you do not have to select "episode selection" and instead choose it from the main menu screen instead.
I'm extremely happy with this product - my only disappointment is where I bought both DVD and Blu-ray the inner artwork is the same, but I'm still very pleased.
The voice acting is very well done as-well.