奥羽電影 (romanised in its own Steam posts as Ouou Eiga and OUDENEI) is the developer and publisher named on Steam for Who Am I エラーコード:九十九. The posts are signed by Misato, who says the game was made to promote their novel エラーコード:九十九, published on Kakuyomu under the name みさと, and who drew the game's artwork; the music is credited to Wounded Healer. The posts also point to an earlier Steam game by the developer. Misato streams on Twitch. Team size and location are not stated.