Shikimori's Not Just a Cutie manga volume 13 features story and art by Keigo Maki.

A new school year begins with the gang in separate classes. But their bond transcends classrooms, and being split up does nothing to weaken their friendships. In fact, new classmates bring fresh opportunities to expand their friend circle. Izumi and Shikimori are in the same class, and are thrilled that Kamiya is with them as well. Everyone tries to include Kamiya in their group, and she has a hard time acclimating at first... But it won't take long before the gang's infectious warmth and joy make her come around!