How a Realist Hero Rebuilt the Kingdom (Manga): Omnibus 6

Souma travels to Lagoon City to further his reforms, and he successfully convinces Castor, his former political foe, to join his new unorthodox military initiative. Meanwhile, to strengthen their familial bonds, Excel organizes a...bridal training course for Liscia and the other queens?! Then, Souma buckles down to manage the kingdom just in time for an envoy to arrive from the Lunarian Orthodox Papal State! The theocracy is politically powerful, and they wish to support Souma as a "Holy King," which would make his land the greatest among all of mankind's nations. But beneath all that power and glory lies a conspiracy that could shake the entire world.

Religion should provide salvation, but this world needs deliverance from the clashing agendas of scheming state actors. Can Souma rise to the challenge?