"Platinum Smile" is Riyu Kosaka

Riyu Kosaka

is a J-pop singer, as well as a member of the Konami-produced J-Pop group BeForU. Kosaka was born in the Kanagawa Prefecture on January 17, 1985.- Discovery by Konami :...

's fourth single with Avex and her fifth single overall. It was released on October 24, 2007 as both a single CD and in a CD+DVD edition. The title track is featured in the movie Kamen Rider The Next

Kamen Rider The Next

is a 2007 Japanese tokusatsu film directed by Ryuta Tasaki and written by Toshiki Inoue. The film was released on October 27, 2007. The film borrows elements from the Kamen Rider V3 television series and is a sequel to the Kamen Rider The First movie...

.

The song is an insert song for the movie with Kosaka providing the singing voice for Erika Mori, who portrays Chiharu Kazami, the younger sister of Shiro Kazami/Kamen Rider V3.

The music clip included in the CD+DVD Edition stars Riyu Kosaka, along with clips from the movie.

CD Side

1. Platinum Smile
2. Platinum Smile Rock Edit
3. Tomorrow Is Another Day
4. Platinum Smile (karaoke)
5. Platinum Smile Rock Edit (karaoke)
6. Tomorrow Is Another Day (karaoke)

Sources

1. http://www.amazon.co.jp/Platinum-Smile-DVD%E4%BB%98-LOVE-HATE/dp/B000UVXI1M
2. http://www.amazon.co.jp/Platinum-Smile-LOVE-HATE/dp/B000UVXI1W/ref=sr_1_1/503-0667089-9313503ie=UTF8&s=music&qid=1193166800&sr=1-1
3. http://www.cdjapan.co.jp/detailview.html?KEY=AVCA-26523