The Knight Blooms Behind Castle Walls manga volume 1 features story and art by Masanari Yuduka.

Rosa dreams of taking up arms as a courageous knight! To be one, she must first be a squire. Those duties around the castle are much less glorious. One moment she’s caring for the horses in the stable. Next she’s battling the task of chopping firewood or conquering a mountain of laundry. She must be ever-ready to assist the knight she serves! Her role may seem small and the tasks mundane, but each is an important step to becoming a knight. Rosa will face every challenge with the heart of a hero!