Death March to the Parallel World Rhapsody, Vol. 16 (light novel)

Showdown in Castle Town! Having successfully averted the airship attack, Satou and company arrive safely in the royal capital. There, they are reunited with Nana's "sisters"-Numbers 1 through 8-and give them the gift of a lifetime. But as is tradition with every trip to the capital, Satou must rub elbows with the aristocracy before he can enjoy his sightseeing. He even receives a surprise visit or two, including a summons from Sir Juleburg of the Eight Swordsman of Shiga! Because no leisurely trip would be complete without a friendly duel...