This volume is really surprising in how much of a departure it is from the mangaka's later works (namely, Immortal Rain). As the title suggests, the majority of the stories are about dying--both a physical and a spiritual death.
As a work, though, this volume really resonates. The stories are often clumsy, and you can see the mangaka's immaturity in them, but the emotions are so very raw and, well, real. I'm sure I'm not the only one who read these stories and went, "Ah, yes, this is exactly what being a teenager feels like."
However, while many of these stories point at a bleak and depressing present, as a whole, the collection seems to point towards a somewhat hopeful future, particularly when taking into account Ozaki Kaori's own end notes. In the end, this volume is ultimately about growing up and become an adult, about leaving behind the difficult, painful, and exhilarating period of one's teens.
As the mangaka herself says, the last story "marks the end" of her "seemingly eternal teenage years," and she doubts she can draw these stories again.