Roses by the bed...

Rather slow in terms of narrative style, but very important 4th part of "Boundary of Emptiness". Reveals how Mikiya, Aozaki and Ryougi came to know each other, Kokutou's dedication to Shiki and Shiki's own internal struggle with her loss of other self and acquisition of new unknown power.
Animation is strong. It doesn't mesmerize, but it does what it takes to deliver the story beautifully without leaving half-assed animation impression.
As usual, beautiful soundtrack and captivating theme song "Aria" from Kalafina add up to the advantages of this episode.
To sum it all up, this movie was more than worthy of my time.