Outline
Renji brings Chihiro to his home where she meets his mother and Shuichi Kuze, though she has merely forgotten Shuichi many times over. After they eat, Chihiro gives Renji a notebook with her notes for her novel which he reads after she leaves for the day. He finds that the novel is rather depressing and representative of Chihiro's life. At school, Kei tries to get Miyako to leave Hiro alone so he will not have to repeat a year of school, but Miyako talks down to her the entire time. Kyosuke films Kei in the morning while she is taking a basketball shot, and she punches him in the gut for filming her without permission. He later asks her to go out with him via Hiro's help.
Aired 04/11/2007EP 5 - Outline

ef ~ A Tale of Memories
On Christmas Eve, Hiro Hirono's bike is stolen by a girl chasing a thief who stole her purse. He gives chase and finds her unconscious and his bike ruined. The girl, Miyako Miyamura, soon awakes and the two begin to talk. After making sure she is okay, they end up spending Christmas Eve together. Later, Hiro finds out Miyako attends the same school as him and they begin to spend more and more time together, Miyako developing affections for Hiro. Kei Shindou -- Hiro's childhood friend who has long held a crush on him -- begins to become jealous and a love triangle follows.
The series also tells the story of Renji Asou. One day, he meets Chihiro Shindou, the twin sister of Kei Shindou, at an abandoned train station. Even though she's very shy, they get along pretty well and begin meeting at the same spot everyday. However, Renji finds out that Chihiro was in a car accident years ago and as a consequence she suffers from a disability: her memory lasts only 13 hours. Nevertheless, after learning that Chihiro's dream is to write a novel, Renji finally decides to help her fulfill her dream while also trying to make her overcome the difficulties imposed by her condition.