Desperate to help Ikki by building him his own Storm Regalia, Kururu launches a risky heist of a super-rare alloy. But her quest for her crush's affections is cut short when Ringo, Ikki's longtime friend and foster sister, reveals her love for him. But before Ikki has any time to process this shock, Kogarasumaru must rush off to face their next foe: a team straight from the pages of Norse mythology!