She is chosen to be in the Sorority alongside Mariko Shinobu and Nanako Misonoo.
~!Junko is the first member of the Sorority who is expelled from it due to her bad grades, despite having a reasonable excuse (her bad health); Fukiko Ichinomiya humiliates her via exposing her case to everyone in the Sorority, and then demanding for her to resign, despite Nanako's objections.!~

Before leaving her cram school, Nanako Misonō asks one of the teachers if they can become pen-pals. The teacher, Takehiko Henmi, is reluctant at first, but eventually accepts the offer. The story is narrated through the letters sent from Nanako as she enters Seiran, a renowned private high school for girls only. There she encounters many difficulties as an ordinary middle-class girl invited to the prestigious Sorority, the most traditional and sophisticated club on campus.. <br><br>
(Source: AnimeNewsNetwork)

Junko Nakaya