Released in September 1984, "Dreaming Girl"was written and composed by Mariya Takeuchi（竹内まりや）. Lyrically, Takeuchi really hit the mark with what a teenage girl like Okada at the time must have gone through: wondering when she will ever be given that freedom to act like an adult, hiding stuff from Mom like nail polish and lipstick, and stuffing that diary in the back of the drawer. The melody also has that 50s bobbysoxer-like feel, with Okada playing it to the hilt in her own music video.
The song itself was never released in an original album but did make it onto her BEST compilations. It reached as high as No. 7 on Oricon. and was used as a campaign song for Glico Chocolates.