王の獣 [Ou no Kemono] Series by Rei Tōma

Prince Tenyou is not what Rangetsu expected, and the political currents in the palace run deep and strange. Does Rangetsu have any chance of finding justice for her brother, or will she become just another Ajin casualty in the game of kings?

Rangetsu knows she must keep a low profile in the palace if she’s to have any hope of tracking down her brother’s killer. But when an Ajin is wrongly accused of murder, can Rangetsu stand idly by knowing that Prince Tenyou has the power to prevent another horrible injustice?

Rangetsu hasn’t given up on vengeance, but nothing about the imperial palace is simple. Now that she knows and trusts Prince Tenyou, she has come to see that her most important duty is to keep him alive for the sake of all Ajin—even at the cost of her own life!

Someone in the imperial palace is trying to kill Prince Tenyou, and Rangetsu has reason to believe it might be the icy third prince, Kougai. When things turn violent on the jiju field, Rangetsu decides to confront Prince Kougai directly—and ends up as the prize in a wager between royal brothers!

Female Ajin are prohibited from serving in the palace, and so Rangetsu’s revenge depends on her ability to maintain her ruse. But when the attendant Taihaku discovers the truth and Third Prince Kougai’s suspicious are roused, will Rangetsu lose her place by Prince Tenyou’s side as well as her chance at vengeance?

Prince Kougai’s interest in his brother’s new beast-servant hasn’t waned, and Rangetsu is forced to forge an uneasy truce with him when his prying uncovers the dangerous truth about her identity. But her past isn’t the only thing the third prince has been investigating, and the palace holds many dangerous truths…

Rangetsu isn’t the only person in the imperial palace with dark secrets. Prince Kougai’s beast-servant Boku knows something about Sogetsu’s final hours, and his confession shatters everything Rangestu thought she knew about her brother’s death!

As Rangetsu and her unlikely allies follow whispered rumors through the palace in search of any hint of her brother, she finds it increasingly difficult to keep from spilling her own secret to Prince Tenyou. But revealing her true nature will upset the uneasy accord she has built between them. And even worse, it might interfere in her desperate hunt for Sogetsu!

Ajin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues... moreAjin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues. Now in a world that promises only bitterness, Rangetsu’s one hope at avenging her brother is to disguise herself as a man and find a way into the palace!After years of pursuing vengeance, Rangetsu has finally found news of her brother—he’s alive! Sogetsu has been kept locked in the inner palace, where his very flesh is harvested as medicine for an emperor obsessed with immortality. And now that the emperor has his hands on both twins and their mysterious powers, he’s never going to let them go… less

Ajin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues... moreAjin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues. Now in a world that promises only bitterness, Rangetsu’s one hope at avenging her brother is to disguise herself as a man and find a way into the palace!Sogetsu may have been released from the emperor’s cruelty, but he’s not yet completely free of his ordeal. In order to survive the experiments he suffered through, Sogetsu’s mind splintered into many personalities…and only one of them made it out of the inner palace. Now he is racked with guilt over being the wrong Sogetsu, and the agony of feeling unworthy of being rescued is pushing him into unexpected action! less

Ajin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues... moreAjin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues. Now in a world that promises only bitterness, Rangetsu’s one hope at avenging her brother is to disguise herself as a man and find a way into the palace!Now that Rangetsu has her brother safely back, she can finally relax after years of revenge-fueled vigilance. But her peaceful days are anything but restful. Without the fiery urge for vengeance to distract her, the terrible disparity between the treatment of Ajin and humans has become even more painfully clear. Can she really be content to stay quietly at Prince Tenyou’s side when the world sees her as less than a person? less