15 Year Lie

15 Year Lie (１５年の嘘), also known as 15 Years of Lies, is a movie directed by Taishi Gotanda and produced by Masaya Kaburagi. It was co-written by Taishi Gotanda and Aqua Hoshino, in the legacy of Ai Hoshino and Aqua's attempt to avenge her.

Purpose
The film is an autobiography of Ai Hoshino's life. According to Frill Shiranui, who had early access to the script, it's an attempt to kill Aqua's and Ruby's father, Hikaru Kamiki.