The twin humpback worms of the Yukon Zoo, the "Poro" and the "Marl" / Maruyama Zoo, the Twin Polar Bear Cubs, the Pororo and the Maruru Cubs, Vol. 41.
円山動物園のホッキョクグマの双子「ポロロ」と「マルル」/Maruyama Zoo’s Twin Polar Bear Cubs “Pororo” and “Maruru” Vol.41