Arnold watches his twin brother chase the throne while he stays invisible, the secret SS-rank adventurer pulling strings from the shadows because someone has to actually make sure Leo survives what he wants. Everyone calls him insipid, forgettable, the prince nobody remembers, and he weaponizes that. The real power fantasy here isn't being the strongest; it's being so good at staying hidden that the world never knows who saved it, until a woman smart enough to see through the mask forces him to stop working alone.

Arnold holds the unfortunate title of the Adrasia Empire's most worthless prince. While his twin brother commands respect and admiration, Arnold coasts through court life as an unremarkable shadow, dismissed by nobles and royalty alike. Nobody suspects the truth: he's Silver, one of only five SS-rank adventurers walking the continent. After the crown prince's death, the fight over who will inherit the throne turns bloody. Leo decides to become a contender. Arnold has no interest in ruling, but he does want to survive, so he quietly works behind the scenes to make his younger twin emperor. Along the way, a woman called the most beautiful lady unexpectedly ends up as his assistant. The result mixes fantasy action, court drama, comedy and romance.