After boasting of his recent success, 6 works with Alice to "induct" Rose into Kisaragi by trying to make her eat a grasshopper, though she detests bugs. 6 barely has time to rest before he's called in to resolve another crisis: the Chosen One, Tillis' brother, has been wounded by two powerful demons while assaulting Duster Tower, a mostly hollow tower with a long, spiral staircase that contains a treasure crucial to defeating the Demon Lord. After his initial plan is shot down and the Kingdom's forces decide to try a frontal assault on the tower, 6 and his unit simply wait for sunset before using a pneumatic gun to create handholds for them to climb up the side of the tower...