"Princess Yuyu" is a vocal unit of Japanese idols, Iwase Yuka and Azusa Yui. They are singers with a pure and innocent image. Footan is a composer of classical based artistic tunes with piano. The collaboration of Princess Yuyu and Footan. "Positive Universe" and "The Ocean of Memories" are included. "Positive Universe" is very nice to listen before Christmas day in Japan. "The Ocean of Memories" will make you relax.