Mitsuki Ichijō

is a teacher, the secretary of Kozo Ryuzoji and the former lover of Takuya Arima.

About
Kozo's secretary has taught history classes at Sakaimachi Academy in the past. She suffers from a fruitless feeling for her college teacher, Kozo, and temporarily associates with Takuya to fill the gap in her heart. It is also the subject of Mio Shimazu's jealousy. She is worried that Kozo's attitude, which was frightened by "she," has suddenly changed, and she embarks on her investigation. Being trapped in the "Schwarzschild radius of the event," she has a tragic ending on any route. In the original version she wore a black shirt and purple suit, but in the remake version she was changed to a light purple rough outfit.

Etymology

 * The name Mitsuki means "beautiful" (美) (mi) and "moon" (月) (tsuki).
 * Mitsuki's surname Ichijō means "one" (一) (ichi) and "article" (条) (jō).