This song is really pretty and it's Nakazawa's 4th single which was released on July 12, 2000. The PV kind of reminds me of something Hamasaki Ayumi would do. It has a semi "Real Me" feel to it.
This is Yuko's second single released on December 2, 1998. It's really beautiful and she sings with Takayama Gen. It has a modern day Maeda Yuki feel to it.