After sacrificing his life to save a child from a speeding bus, Bai Ge awakens on the roof of a high-rise in Nagazora City. He quickly deduces that he has transmigrated into the dangerous world of Honkai Impact 3rd, specifically just before the catastrophic Third Honkai Eruption. Equipped with a sarcastic system interface and the identity of a wealthy, handsome transfer student known as the 'Prince of Senba Academy,' Bai Ge navigates this new reality with surprising calm.

Unlike the typical male character in this universe who suffers from low Honkai adaptability, Bai Ge possesses unique advantages. His first day at school leads to an immediate, awkward encounter with Raiden Mei, the future Herrscher of Thunder, who is currently isolated and bullied following her family's downfall. While others shun her, Bai Ge's curious and friendly gaze offers a glimmer of hope.

As he balances his gamer knowledge of future tragedies with the pressing need to survive, Bai Ge resolves to change the fate of the heroines he admires, aiming to become the protector they desperately need in a world teetering on the brink of destruction.