A group of curious Gollem engineers traveling in a great airship arrives in the Duchy of Brunhild. Their sudden appearance alone is puzzling enough, but what do these Seekers want with Yumina's white crown? Are there further secrets lurking within the ancient ruins of Gandhilis? And on top of that, will Yakumo ever come home?Hold fast for a tale of swords, sorcery, and mechanical marvels!