Ai Sp@ce is a 3D virtual world MMO game developed by the Japanese studio Headlock, with the support of three visual novel makers - Visual Art's / Key, Omegavision / Navel, and CIRCUS - and the online service provider Dwango. The game features a central area called "Akihabara Island", connecting three other virtual islands, each dedicated to a popular visual novel game by the above-mentioned dev-trio: Clannad, Shuffle! and D.C. II: Da Capo II resepctively.