Kazuki enjoys playing soccer and his love interest is Eriko.
Kazuki meets Eriko in a classroom and experienced his first kiss when she suddenly began an 'experiment' with him.
The series aired in a late-night 10pm slot, as part of ITV2's "XXL Thursday" programming block.
The theme song is an excerpt of "You Know I'm No Good" by Amy Winehouse.
Secret Diary of a Call Girl is a British television drama broadcast on ITV2 from 27 September 2007 to 22 March 2011 based on the blog and books by the pseudonymous "Belle de Jour," starring Billie Piper as Belle, a high-end London call girl.