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Ryuu to Yuusha to Haitatsunin Shikaban
También conocida como: The Dragon, the Hero, and the Courier: Self-Published Edition, Updating, 竜と勇者と配達人 私家版 · 竜と勇者と配達人 私家版
Bonus chapters that never made it into the main series volumes, behind-the-scene stories and additional information. This book was self-published by the author with official permission granted from Shueisha.