Short answers, pulled from the story.
Brotherhood: Final Fantasy XV first aired on the 30th of March 2016. The series was conceived by producer Akio Ofuji in 2014 to expand upon a brief reference in the game to Prompto's difficult upbringing.
Brotherhood: Final Fantasy XV was co-produced by Square Enix and A-1 Pictures. Producer Akio Ofuji conceived the series in 2014 to explore the childhood of his favorite character Prompto Argentum.
Noctis Lucis Caelum and Ignis Scientia grew up together and forged a relationship built on trust and mutual respect. The series shows how the two boys navigated the complexities of their social classes and the expectations placed upon them.
Prompto Argentum found his voice through photography after struggling with obesity and loneliness during his childhood. The series depicts his journey from a lonely boy to a confident young man who uses his camera to see the world differently.
The peace between Lucis and Niflheim was a fragile truce that shattered when Niflheim invaded Lucis. The empire stole the Crystal and killed King Regis, forcing Noctis and his friends to fight for their lives and future.