Kanako is reflecting on her Kyudo club trial, when Miki brings Mariya a letter from Kanako's father–a letter that contains a shocking claim. Could it be? Are Kanako and Mariya really sisters? On top of everything else, a joint-academy festival with Mihoshi no Mori brings all the craziness to 120% in this, volume twelve of Maria Holic, the hilarious love comedy!