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. <br><br>
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. 

Episode 01 - Eve

Episode 02 - Upon a Time

Episode 03 - Paradox

Episode 04 - Honesty

Episode 05 - Outline

Episode 06 - Rain

Episode 07 - I...

Episode 08 - Clear Colour

Episode 09 - Forget Me Not

Episode 10 - I’m Here

Episode 11 - Ever Forever

Episode 12 - Love

Shaft

Rondo Robe

Sentai Filmworks

NBCUniversal Entertainment Japan

ef ~ A Tale of Memories