Yoshida's Ex-girlfriend will not appear in Higehiro anime

AO Kanda revealed as Yoshida's Ex-girlfriend in currently airing anime  Episode-7. But she will not appear in anime because of less episodes. Author of Higehiro light novel recently twitted following message to 'Higehiro: After Being Rejected, I Shaved and Took in a High School Runaway' fans

"I'm so sorry to Kanda-san fans! Her only appearance in the anime will be through photographs. If you want to know more about what is left out in the anime adaptation, and if you want to know who the girl shown in the photo was, please see the original material or the manga adaptation (where Ao Kanda is currently relevant)."

Higehiro Light Novel : It is a Japanese light novel series by Shimesaba (Author) and illustrated by booota. It began serialisation online in March 2017 on Kadokawa's user-generated novel publishing website Kakuyomu. It was later released by Kadokawa Shoten with four volumes from February 2018 under their Kadokawa Sneaker Bunko banner. On June 1, 2021, the fifth volume of the series will be released, bringing the series to a close.

Anime Series :From 5 April 2021, Project No.9 began airing an anime television series adaption. Anime series have 13 Episodes and 7 are currently aired.

Source :Shimesaba Twitter, Wikipedia