"Kimi ga Nozomu Eien" is the fourth visual novel developed by Âge. The producer and head planner for "Kimi ga Nozomu Eien" was Hirohiko Yoshida, the executive director of Acid, the publishing company that Âge is under. The scenario was written by three people: Hayato Tashiro (under the name Kichikujin Tam), Ai Shibuya (under the name Maro Guts), and Hokuto Matsunaga (under the name Hanjūryoku Seimei Maa). Art direction and character design was done by Kai Sugihara (under the name Baka Ōji Persia). The music in the game was produced by Lantis and composed by Abito Watarai.