Tsukishiro

Tsukishiro is the acting director of the Advanced Nurturing High School after Chairman Sakayanagi's temporary suspension.

Appearance
Tsukishiro is a middle age man wearing a suite.

History
Tsukishiro was sent to the school by Professor Ayanokōji (Kiyotaka Ayanokōji's father) as the acting director in order to get Kiyotaka expelled and return to the White Room.

Plot
Tsukishiro made his first appearance in Volume 10 where he appeared in the special building, in front of Kiyotaka Ayanokōji and Arisu Sakayanagi while they were talking about the circumstances of the special exam that had just ended. He asked for where the staff room is, then proceed to introduce himself as the new acting director of the school. After exchanging some words, he started walking past them and suddenly kicked Arisu's cane. Kiyotaka caught her but got pushed by Tsukishiro against the wall right after. Arisu asked if acting violently against the students would be a problem, to which Tsukishiro replied that the surveillance camera had been replaced with a false image. He then gave Kiyotaka a message from his father, threatening him to come back. Tsukishiro continued provoking Kiyotaka but he did not retaliate, in case the camera was actually still recording. Tsukishiro then released Kiyotaka and left, announcing that he'd formally start working at the school in April.

In Volume 1 of Second Year Arc, he offers a bounty of 20 million private points for the person that can expel Kiyotaka.

In the epilogue of Volume 2 of Second Year Arc, he appears at the epilogue with Tsubasa Nanase asking her to expel Kiyotaka in the next exam so that they could go back to where they belonged.

In Volume 3 of Second Year Arc, he was discussing with Katsunori Shiba about their plan to expel Kiyotaka. Honami Ichinose accidentally overheard their plans of luring Kiyotaka and some faint information about the White Room. Shiba caught Honami and held her, but Tsukishiro ordered him to let her go. He allows Honami to go but threatens her that if she tells anyone about their conversation, he will personally force a group from her class to retire, which causes the group to be dropped out. It was also revealed that Tsukishiro had sabotaged Kiyotaka's emergency alert to go off.

Etymology

 * The surname Tsukishiro means "moon" (月) (tsuki) and "castle" (城) (shiro).

Trivia

 * His first name has not yet been revealed.