Facing struggles with her father's re-marriage and cheating ex-boyfriend, 17-year-old high school student Mizuki Mochizuki falls in love with Adam, a British musician, one night under the full moon.

At the same time, 5th grade elementary school student Hotaru Shiraishi is also hospitalized from a car accident while looking for her pet cat Lulu and dreams of a girl who helped her look for her.

With the help of her classmates Sae Kayama, Tetsu Sugisaki, and Masaki Miura, Hotaru assists the girl with recovering her memories.

Sugisaki and Miura are then able to identify Eve as Mizuki, and the children learn that she is alive but in a coma, leading Hotaru to the conclusion that she will awaken if she is able to meet Adam again.

At the end of the series, Mizuki returns to her normal life with no recollection of what had happened, and the children bury Sae's notebook inside the abandoned mansion.

Written and illustrated by Ai Yazawa, Last Quarter was serialized in Shueisha's monthly shōjo manga magazine Ribon from the April 1998 to the June 1999 issues.

[10] A live action film adaptation, written and directed by Ken Nikai [ja] and distributed by Shochiku, premiered in Japan on October 9, 2004.

[16] The film was licensed by Geneon Entertainment for North American distribution in English, and it was released on DVD on July 4, 2006.