 In the process, Aiba and Yuuko encounter a former colleague of Suedou, who gives them details regarding the EDEN Beta test eight years ago; Kamishiro sent five children, one of which was Yuugo, into the Beta as a demonstration to investors, but something went wrong and the test was aborted.Four of the children logged out successfully, but were heavily traumatized, and Yuugo never regained consciousness, becoming the first EDEN Syndrome victim.To cover up the disaster, Suedou had the memories of the remaining four children erased.