Wolf & Parchment: New Theory Spice & Wolf, Vol. 10 (light novel) — Isuna Hasekura

After punishing the false Twilight Cardinal who caused chaos in Estatt, Col decides to fully embrace the weighty title as he continues to prepare for the upcoming ecumenical council. Things are progressing smoothly right until he hears that Ilenia, a sheep spirit, has been thrown in jail. What’s more, her prison is in the mountain city that is home to one of the seven prince-electors and a stronghold ruled by the famed mercenary king to boot. While Myuri is eager to rush over and save Ilenia, things become complicated once they learn this is all connected to the kidnapping of the prince-elector’s personal astronomer…!