Kishi-tan wa Jouheki no Naka de Hana HirakuKishi-tan wa Jouheki no Naka ni Hana Hiraku; 騎士譚は城壁の中に花ひらく; Kishitan wa Jouheki no Naka ni Hanahiraku; The Knight Blooms Behind Castle Walls; The Story of a Knight Blooming Within the Castle Walls

Taking arms and protecting the people, Knights. And the apprenticeship period to obtain that title...... The job of a knight apprentice is not to practice with the sword nor ride horses, but anywhere from taking care of horses to laundry; all sorts of odd jobs. At the Padlock Castle, Claustra, the story of the knight apprentice Rosa begins!