The film is based on the light novel series Book Girl written by Mizuki Nomura, with illustrations by Miho Takeoka.

Tohko had previously set up a birdhouse on the school grounds so anyone could ask the literature club to help them in matters of love by submitting letters.

Tohko recognizes the drawing to be from the original manuscript of Kenji Miyazawa's poem "Songs of a Defeated Young Man".

There, he finds Nanase confronting Miu, who had previously attempted to kill herself when she and Konoha were in junior high school.

This was due in part to Konoha winning a new author's contest with his novel Similar to the Sky, which he wrote under the pen name Miu Inoue.

Konoha had dropped school in order to take care of Miu always and also resigns from the literature club, to which Tohko replies she'll be waiting for his stories (as he decides never to write again).

Years later, Konoha has put out his second novel titled Book Girl, and an editor comes to his house to read his newest work before it gets released.

[3] The film's theme song is "Haruka na Hibi" (遥かな日々, Distant Days) by Eufonius; the single was released on May 1, 2010 by Lantis.