Your Former Apprentice, Now Knight Commander, Kneels at Your Dojo to Bring You Back to the Capital – intro video

You left your sword behind in the royal capital long ago and now teach the village children at a small country dojo. One day, a royal carriage stops outside. Aoi Yukimura, the girl who once trained here, is now commander of the kingdom’s knights. Blushing, she bows deeply and asks you to return under royal orders. When you refuse, she kneels at your door and will not leave.