The anime, which is set to premiere on January 9 in Japan, is based on the gothic manga series by Aya Kanno, The manga, which is serialized in Akita Shoten’s Gekkan Princess magazine, began in 2014 and has 15 tankoubon volumes as of March 2021. A spin-off titled King of Idol: Baraou no Gakuen began in early 2021.
Viz Media describes the story as:
Richard, the ambitious third son of the House of York, believes he is cursed, damned from birth to eternal darkness. But is it truly fate that sets him on the path to personal destruction? Or his own tormented longings? Based on an early draft of Shakespeare’s Richard III, Aya Kanno’s dark fantasy finds the man who could be king standing between worlds, between classes, between good and evil.
The staff of Requiem of the Rose King includes Kentarou Suzuki (Angels of Death) as director, with Hiroki Uchida (Gamers!) as series composer and scriptwriter, Tsutomu Hashizume (Mewkledreamy animation director) as character designer, Kentarou Izumi (A Certain Scientific Railgun T) as art director, Mayumi Tanahashi (Skate-Leading Stars) as color designer, Akihiro Takahashi (A Certain Scientific Accelerator) as photography director, and Kow Ootani (Wise Man’s Grandchild) as music composer. J.C.Staff is the animation production studio.
Meanwhile, the cast includes Mitsuki Saiga as Richard, Hikaru Midorikawa as Henry, Shou Hayami as the Duke of York, Kousuke Toriumi as Edward, Yasuaki Takumi as George, Satoshi Mikami as Warwick, Satoshi Hino as Calesby, Sayaka Oohara as Margaret, and Kouhei Amasaki as Edward of Westminister.
Source: BANDAI NAMCO Arts Channel