Uesugi Kagetora was originally named Hojo Ujihide, and was the seventh son of Hojo Ujiyasu. After the Hojo family and the Uesugi family formed an alliance, he was sent to the Uesugi family by his family to be the adopted son of Uesugi Kenshin, and was named Uesugi Kagetora. In 1578, Uesugi Kenshin died of illness, and Kagetora and Uesugi Kagekatsu, another adopted son of Uesugi Kenshin, fought for the right to inherit the family, which was called the "Otate Rebellion" in history. Kagetora was originally in an advantageous position, but the situation took a big turn and Kagetora almost committed suicide. The protagonist of this story, Ogi Takaya, is the reincarnation of Uesugi Kagetora, but he has completely lost his memory of his previous life until the appearance of Naoe Nobutsuna, a retainer of the Uesugi family, and he found that everything around him was different from usual. People who were in the same era as Uesugi Kagetora in the past slowly approached Ogi Takaya, and strange events happened again and again. Takeda Shingen attached his soul to Takaya's friend Narita Jo, and although Naoe wanted to seal it with a bracelet, it didn't work. In order to save Ran, Takaya went to Matsumoto Castle. A group of skeleton warriors under Takeda Shingen appeared around Takaya. Although he defeated them with the help of Naoie and successfully rescued Ran, the troubles have just begun...---------------------------The animation of Flame Mirage is adapted from "Flame Mirage", one of the three classic Japanese BL novels, written by Kuwahara Mizuna. The current animation production content is roughly 1-9 volumes of the novel (Volume 1 Flame Mirage, Volume 2 Scarlet Afterimage, Volume 3 Glass Son Morika, Volume 4 Amber Meteor Group, Volume 5 Mahoroba Dragon God, Volume 6 The Mirror of the Overlord (Part 1), Volume 7 The Mirror of the Overlord (Part 2), Volume 8 The Mirror of the Overlord (Part 3), Volume 9 The Rebel of Minagiwa).