Am I Actually the Strongest? manga volume 2 features story by Sai Sumimori and art by Ai Takahashi.

After Hart saved his mother and younger sister, Charlotte, form the Imperial Soldiers, Charlotte goes from fearing her older brother to mistaking him for a hero in pursuit of justice! Deciding to play along, Hart calls himself the Black Knight and ventures forth to protect the frontier region he calls home, only to discover the true mastermind targeting his family...