RahXephon Kansoukyoku: Kanojo to Kanojo Jishin to - Thatness and Thereness

ラーゼフォン 間奏曲 / 彼女と彼女自身と 「Thatness And Thereness」

Quon Kisaragi was surprised when she saw an illusion of herself floating in midair. This other "self" of her claimed that she is a fragment of Quon. Thus an existentialistic dialogue began between the two.

(Source: Anime News Network)

OVA side story bundled with the RahXephon Special Edition game for the Sony PlayStation 2.