I really enjoyed all the books in the series. I'm pleased with the ending, although there are a few things that seem to just have been dropped along the way...

Buzzcut and Ponytail were on their way to Tokyo, then nothing was hard of them again. Tengo's mother, Tamaki, Ayumi, and Kumi Adachi all died in the same way, with no particular explanation of why, or who did it, or any mention of how they were linked, if at all.

Anyway, enjoyable story. :-)