An action-packed adventure based on the popular video game, Honkai Impact 3rd: Second Eruption!With the clock on Sirin's ultimatum ticking down, Welt and Siegfried join forces to take the battle directly to her — on the Moon. With the fate of the entire world in their hands, the unlikely pair will have to use every ounce of their wit and ingenuity if they hope to match Sirin's ever-increasing power.  It's humanity's fiercest warriors against a terrifying inhuman threat!Will heart and light prevail over a vast and vengeful darkness?  There's only one way to find out.