White Room

The White Room (ホワイトルーム) is an unknown organization or institute where the early upbringing of Kiyotaka Ayanokōji took place. It was headed by Kiyotaka's father and was a main cause in the talents that he has developed and would help him in later years.

History
The room appeared in anime flashbacks when Kiyotaka, as a young child, and other children were lined up before one of them suddenly collapses as the other children are worried as he simply looks on unfazed.

At some point in the past, a man who was later revealed to be his father appeared, told him that those who waste their talents are fools, which gives reason as to why he prefers to keep his talents hidden from others. Some time after that, due to being suffered from the arduous training, a majority of the children had dropped out leaving Kiyotaka as the only known remaining survivor, that led him come to regard all humans as mere tools.

Trivia

 * Although the room makes minor appearances in the anime, its name was only mentioned by Arisu Sakayanagi in Light Novel Volume 5.