"The ruined planet, Filgaia. Ashley, Virginia, Jude, Dean, and Clarissa—adventurers known as “Migrant Birds”—were in trouble due to Mother, the leader of the Metal Demons. Are they not able to stop mother’s plan? Will they have to accept their fate of despair? Mother’s crazy laughter echoes. Countermeasures against the worst possible situation should have been devised, and yet such a situation is occurring... "Why did you betray everyone? Rudy..." Fates will cross, and feelings will connect—-."