BBK/BRNK - Season 1 Episode 13 Black Oubu

Half a month after the battle on Treasure Island, Kogane, Kinoa, Shizuru, and Hiiragi ride through the lively streets of Taiwan in a taxi... but Azuma got stuck in immigration and had to catch a later flight. The girls are thrilled by the sights of their first visit to Taiwan, but Hiiragi reminds them that they're there to find the body of the Buranki that went missing when Treasure Island fell. Just then, a headless Buranki shows up at the airport where Azuma is soon due to arrive...