Da Capo II
Primary development was handled by Headlock which worked in collaboration with Key under Visual Art's, Navel with Omegavision, and Circus for the design of the bishōjo game heroines featured in "Ai Space" from "Clannad", "Shuffle!", and "Da Capo II". "Ai Space" was initially going to be a text-based game similar to that of visual novels, but this was changed in favor of a 3D environment. Dwango's subsidiary Niwango ties in the Nico Nico Anime Channel from the Nico Nico Douga video sharing website by providing users the opportunity to upload gameplay sequences online. The trading card game company Bushiroad is also involved in the project. I've Sound member Kotoko sings the first theme song for "Ai Space", entitled , and the single was released on December 3, 2008. Other music provided in the game is taken from the three visual novels used as a basis for "Ai Space".