The gameplay in Eternal Fantasy follows a linear plot line, which offers pre-determined scenarios and courses of interaction, and focuses on the appeal of the main female characters, but differs from traditional visual novel in that the player is allowed to navigate in an overworld map from a top-down perspective, and its utilization of a combat system.

[1] While on the overworld map, a scaled-down depiction of the game's fictional landscape, the player is allowed to navigate between locations from a top-down perspective.

Gameplay in this segment requires little player interaction as most of the duration of the game is spent on simply reading the text that appears on the screen, which represents either dialogue between characters, or the inner thoughts of the protagonists.

One of the goals of the gameplay is to view the hentai scenes, depicting one of the protagonists having sexual intercourse with one of the heroines.

[2] Planning and the original story was done by Futsumamu, who also contributed in character designs, along with Eko, Natsuki Tanihara, Soba Aki, Narumi, and Mochi Chinochi.

[3] Scenario work was split between six people, Masaki Sonoda, Fumihiko Kuwabara, Shingo Hifumi, Aiha, Mori no Me, and Shin Gotō.

An internet radio titled D.C. to EF being produced by Onsen began streaming online on October 11, 2007.

The show is based on Eternal Fantasy and Da Capo II, and is hosted by Ai Hinaki, Hijiri Kinomi, and Aya Tachibana, who voiced Locomoco, Farte, and Arcie in the visual novel respectively.

[7] The visual novel's original soundtrack was released on January 23, 2008 containing fifty-eight background music tracks on two discs.