Newly cured and brimming with confidence, Rudeus resolves to marry Sylphie. Just one problem: he has no idea how marriage works in this world. And when friends tell him any newlywed needs a house, he winds up with a haunted mansion.

Rudeus receives a letter from Paul. The letter explains that Norn and Aisha, Rudeus's younger sisters, have been sent to join Rudeus. Meanwhile Nanahoshi continues her research into summoning magic for a way to return to her original world.