This volume is for the Omamori Himari fan who wants information about the Demon Slayer Families, the main characters, and summaries of the first five volumes all in one place. There are also several side stories that provide some background to events in the main story arc, such as how Kuesu acquired a "treasury of knowledge," which turned her hair from black to white. The volume begins with the gang visiting a hot springs and Yuuto ending up on the women's side of the pool. Everyone is naked, of course. The volume also includes profiles of the main characters, a dream sequence by Rinko about her and Yuuto when they were just becoming friends, and a story about when Himari visited the 3rd Ranked Kagamimori Family for a short fight sequence. Himari and Kasuri, one of the Shrine Maidens from the Kagamimori Family, make reference to the latter story in volume 9. I must admit that there were times when I went to various websites for information about this manga because I had trouble following some of the plot threads. This volume brings together information touched on here and there in the first 9 volumes, but never presented in a clear way, at least for me. Thus, I really appreciate this volume and how it helps fill-in some of the gaps in my knowledge about the overall setting of Omamori Himari. I recommend it for anyone who wants to know all that he/she can about the people in this manga and their history. On the other hand, there isn't anything here which is vital for understanding the main story. If you love Omamori Himari as much as I do, then then buying this supplemental volume is money well spent.