 All four artists had equal parts in the song, with all four joining in the chorus and the various verses.This was the third time LISA had worked with Koda Kumi, whereas she had written the music and helped with the lyrics on Kumi's song "One" from her studio album "Grow into One", and for the song "Magic", which was released one month prior to "Switch/I Only Want to Be with You" on her album "Feel My Mind".The second A-side, "I Only Want to Be with You" is a cover of the 1963 Dusty Springfield song of the same name.