I apologize, but I don't have any specific information about "Sky Angel Vol. 87." This title could refer to various things, such as:

1. A manga or anime series

2. A magazine issue

3. A music album

Without more context, it's difficult to provide accurate details. If you can give me more information about the type of content or what medium it's associated with (e.g., is it related to a particular franchise or genre?), I may be able to help you further.

If you're looking for specific information about this volume, such as its release date, plot summary, or where to find it, please provide additional details so I can assist you better.