The Prince in His Dark Days volume 3 features story and art by Hiko Yamanaka.

Plucked from her dreadful surroundings, Atsuko is still living as Itaru, a capricious and spoiled heir who ran away from his charmed life. Her co-conspirator, Ryo, teaches her that to pass as one of the elite, she must be cold and cruel. However, amid the ranks of the wealthy, she meets Daigo, a gentleman who shines like a true prince. Before long, Daigo sees through Atsuko's facade and makes a troubling request when she has no on to turn to... Meanwhile, Itaru struggles to forge his own life in a completely new world.