Cosmic Vanguard [Progression Fantasy LitRPG]

Alan was a depressed man who had isolated himself in his apartment after losing his mother and ultimately his interest in life. However, everything changed when an alien invasion welcomed Earth to join an intergalactic federation. There, he rediscovered purpose. A spark for life was reignited through the exhilaration of battle and the exploration of the vast universe that unfurled before him.

His group stands out not because it includes a skilled assassin or even a literal god, but because he cracked the Yang–Mills existence and mass gap problem. This will be discussed in great detail in the story… or maybe not. What's certain is that Alan will eventually have to face the complexities of intergalactic politics, but for now, he's pursuing new challenges, enjoying his brand new world, and maintaining the spark alive.