Tsukimichi: Moonlit Fantasy (Light Novel), Vol. 18

Makoto Misumi finds himself drawn into a plan spearheaded by the great merchant Patrick Rembrandt to secure independence for the frontier city of Tsige.
Kahara Sairitsu, an influential figure in the Lorel Union who is supporting the plan, tells Makoto about Picnic Rose Garden, a powerful mercenary company renowned for its defensive prowess.

Hoping to make the cheerfully named mercenary company the cornerstone of Tsige's defenses, Makoto and the rest of the Kuzunoha Company travel to Kannaoi, Lorel's second-largest city, to seek their cooperation.

However, the people of Lorel hold the "Sage"—descendants of Japanese people who came to this world—in especially high regard. There is no chance they will simply leave Makoto alone...