Aoiro Toshokan青色図書館; 青色图书馆; 青色圖書館; Aku, Dia Dan Pustaka Biru; Seishoku Toshokan; The Blue Library

Desperate to get her hands on a gown she saw on her way home from school, Hina jumps into "Aoiro Toshokan" for a part-time work. There, she ends up working under the Library Director who is also an author known as Shimokomoriya. Thus begins Hinas's boring days with the handful Sensei. Also included is a one-shot titled "2-nen H-gumi Gakkou no Susume".