The original visual novel 'Ef: A Tale of Memories' developed by Minori is released in Japan, introducing the story and characters to players.
The sequel visual novel 'Ef: A Tale of Melodies' is released in Japan, continuing the story from the original game.
The anime adaptation of 'Ef: A Tale of Memories' directed by Shin Oonuma premieres, bringing the story to a wider audience through television.
The anime adaptation of 'Ef: A Tale of Melodies' premieres, continuing the story from the first anime season.