Kanojo ga Flag o Oraretara Temporada 1 Episódio 9

Everyone from Quest Dorm goes to Nanamis home country, the Principality of Bladefield, and runs into Nanamis little sister Hakua, and the crown prince. Then theres big news about Hakua and Nanami. Then No. 0 talks to Hatate about the founding fairy tail of the country.