High School Prodigies Have It Easy Even in Another World!, Vol. 13 (manga)  (English, Paperback, Bovia Brandon)

The curtain closes on the story of the high school prodigies' revolution in another world! Having put an end to the civil war in Yamato, Tsukasa and the others can finally head for the elf village and put what they learned from Adel's memoir to use. Just who or what exactly is the "wicked dragon" Yggrda, and why did she summon them to this world? As their long journey comes to an end, it's finally time for them to learn the truth...