The addition of "Why" was revealed by Square Enix in May 2007, with Ayaka stating that she was fascinated by Crisis Core's story and felt she "would like to deliver "Why" alongside Zack's fate to the hearts of many people."
Includerea acestei piese a fost dezvăluită de Square Enix în mai 2007, cu Ayaka menționând că era fascinată de povestea lui Crisis Core, dorindu-și ca prin „Why” să transmită spiritul lui Zack spre inimile multor oameni.