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 realizes he has transmigrated into the dangerous world of Honkai Impact 3rd, just before the catastrophic Third Honkai Eruption. Armed with a sarcastic system and his knowledge as a former player, Bai Ge navigates this perilous reality where men possess little Honkai adaptability.

Reincarnated as the wealthy and handsome 'Prince of Senba Academy,' he finds himself surrounded by admirers but focused on survival. His attention turns to Raiden Mei, the future Herrscher of Thunder, who is currently isolated and mocked by peers following her family's downfall. While others shun her, Bai Ge offers a simple, genuine greeting, sparking confusion and a glimmer of hope in the depressed girl.

As he balances his playful gamer mentality with the grim reality of impending apocalypse, Bai Ge must decide how to alter the tragic fates of the heroines he once controlled on screen, aiming to become the hero they truly need.