This is a used paperback book of Tengai-Retrogical Volume 1 by Rin Asano.  I purchased this as an Ex-Library book, and it's in acceptable condition.  The cover has wear (some bends, stickers, etc), but the inside pages are in good shape and the binding is tight, see photos.

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Please pay within 3 days of purchase.  I ship to the United States only.