末っ子皇女殿下 8 Stonehead SAHAの高価買取価格

The ISBN 9784046854551 corresponds to the light novel "末っ子皇女殿下" (Metsuko Kōjo Henka) which translates to "The Youngest Princess" in English. It appears to be part of a series authored by Stonehead SAHA. As of my last update, details about the plot and characters may be found in reviews or summaries online. If you need specific information about this particular volume or its story, feel free to ask!