2006. The album was released on August 6, 2008. The title Color Change! reflected from Crystal Kay's graduation from Sophia University that year. Color Change! peaked at number 6 on the Oricon daily chart and number 8 on the weekly chart, selling 15,519 copies in its first week. The album sold 33,290 copies after seven weeks on the charts. Color Change! was eventually certified gold by RIAJ. Color Change! was the 289th best selling album of 2008 in Japan. 2009–2010: ten years in the industry On February 18, 2009, Crystal Kay was a featured artist with Verbal of M-Flo on the song "Universe" with South Korean singer BoA from her single Eien/Universe/Believe in Love. The single peaked at number 8 and has sold 21,789 copies. On May 15, 2009, it was announced that Crystal Kay and Jin Akanishi, from the boyband KAT-TUN, had written a duet called "Wonder". The song was first performed by Akanishi on the KAT-TUN's concert tour in 2009. This was the second time that Crystal Kay sang with him, the first being during her second appearance on KAT-TUN's variety show, Cartoon KAT-TUN. On August 12, 2009, Crystal Kay released her twenty-fourth single, "After Love (First Boyfriend)" / "Girlfriend". The single was announced on Crystal Kay's official website on July 1, 2009, which marks the tenth anniversary since the release of Crystal Kay's debut single in 1999. "After Love (First Boyfriend)" features Kaname from the J-pop duo Chemistry. "After Love (First Boyfriend)" is a follow up to Crystal Kay's 2003 single "Boyfriend (Part II)" and used as the CM song for Tully's Coffee commercials throughout July 2009. "After Love" was written by Craig McConnell and Canadian artist Shobha, with Japanese lyrics by Crystal Kay. "Girlfriend", featuring the Korean artist BoA with whom Crystal Kay is reportedly close friends, was used as the image song for the Japanese dubbed release of the feature film He's Just Not That Into You starring Jennifer Aniston and Ben Affleck. The single's b-side, "Deaeta Kiseki", was released digitally in December 2008 and was also used as the CM song for Tully's Coffee that month. "After Love (First Boyfriend)" / "Girlfriend" was Crystal Kay's second double A-side single, and her first since "Kirakuni" / "Together" in 2006. The single landed on the Oricon Daily Chart at peak position number 21 and on the Oricon Weekly Chart at number 31. On September 2, 2009,