There is only one black rose left now. Akio is wondering if Mikage will finally fight Utena himself. But instead of fighting, Mikage decides to include Utena in his side, and asks Utena to join his Mikage Seminar, but Utena turns it down. Mikage talks about Nemuro Memorial Hall, where Mikage now holds his seminar. Decades ago, there was a professor called Professor Nemuro, who was doing some research at the hall. One day, there was a fire, and the hall burned down, which took away 100 lives of his students.
Professor Nemuro was actually Mikage himself. He used to work with 100 brilliant schoolboys on Project Rose Signet, which was a research to revolutionize the world and obtain eternity. Since it was only a contract with the academy, or Akio himself, Professor Nemuro was indifferent about the objectives. One day, an inspector from the trustee, Chida Tokiko, came to Professor Nemuro's office. Later, Tokiko invited Professor Nemuro to her home. And Mikage met Tokiko's brother Chida Mamiya for the first time. Mamiya had a fatal disease, and for his sake, Tokiko wanted to get eternity that the academy was seeking for. From this day, Professor Nemuro became enthusiastic about the research. Afterwards, Akio appeared in Professor Nemuro's office, and gave him a ring with the Rose Signet and made a contract of the Rose Signet with him: "I suppose you have no choice but to revolutionize the world. The way before has been prepared," Akio said. One night, Mamiya set fire to the hall. Professor Nemuro said to Tokiko that Mamiya was right, and this sacrifice of 100 lives was the necessary first step to reach the stage of the revolution from the academy.
Back to the present time, Tokiko, now an old woman, comes to the academy to visit Mamiya's *grave*, and also meet Akio for the first time after the decades. She says Professor Nemuro, as well as Akio, is still as young as he was back then.
Mikage va-t-il finalement affronter Utena ? Il semble qu’il préfère plutôt attirer notre duelliste dans son séminaire... Mais celle-ci n’a pas l’air intéressée par la proposition. Mikage revient néanmoins à la charge, déterminé à faire entrer Utena dans l’Association de la Rose Noire, et lui confie la terrible histoire du professeur Nemuro et du Mémorial qui porte son nom...
高等部3年の生徒であり、御影ゼミを主宰する天才･御影草時は回想する。かつて、根室教授と呼ばれ、ある研究を行っていた時を。“世界を革命する力”計画の始まり、そして、千唾時子と馬宮との出会いを…。
根室紀念館～傳說過去曾有百名學生在此因火災而殞落的建築物。御影草時，過去在此被稱呼為根室教授，研究著「發動世界革命之力」。過著索然無味日子的他對於自己的研究或是那個力量都不抱持興趣。可是，在和監察官千唾時子的弟弟馬宮相遇後，對於時子的好感改變了他。然後，他目擊她和鳳曉生相愛的現場。這份沒有去向的好感，驅使他著手研究獲得「發動世界革命之力」的計畫。可是，那已經是數十年前的事了…
