Ginga Eiyū Densetsu Die Neue These S01E03 - An Indomitable Prodigy

Annerose, Reinhard's older sister, lives in the palace as the kaiser's favorite mistress. As Reinhard and Kircheis make their way to her residence for a visit, they both recall memories of their childhood together. Then Annerose, after greeting them with a smile that hasn't changed since they were young, asks Kircheis to continue looking our for her brother and guide him back toward the right path if he ever goes astray.