Tokimeki no Story

Tokimeki no Story (ときめきのストーリー) is the song used in Lush Remix in Rhythm Heaven Megamix. The song was performed by Tokimekist (Chi-chan, Rino Hirayama, Mai-chan, Yurinko), written and composed by Tsunku♂, and arranged by Koichi Yuasa. The vocals were removed in the international version.

It was performed live in Rhythm Tengoku: The Uta Matsuri+, which is the only time the song was heard in full.

Commentary
The following is commentary given on the Tsunku♂ Official Blog.

Trivia

 * The word "tokimeki" in the title refers to the beating of one's heart (out of joy or excitement). In the context of this song, it may refer to the feeling of anxiety the singer feels while dancing in front of an audience.