Decent spin-off and I enjoy the concept behind Suzune's character and motivation, but the final volume is just a bit iffy to me. I read somewhere that the author was pressured to extend it an extra volume, and I think it shows. Up until then it was a pretty solid story, if just slightly fast-paced, but the addition of the final character just made it messy. The author did a great job integrating her into the story, but her design and personality didn't feel particularly well-done. She just feels edgy, no real substance.