マケン姫っ！ ドキドキッ！マケン姫っ！秘密の訓練
Maken-ki!: Doki Doki! Maken-ki! Himitsu no Kunren
Each of the six volumes of the Maken-Ki! Blu-rays will carry a 10 minute long short anime "Doki Doki! Maken-ki! Himitsu no Kunren". Secret trainings with the main characters will be animated.
