Mirai no Tobira

 was the only solo single released by Kawano Mika. The CD was sold exclusively at her live events, and is now out of print.

Tracklist

 * 1) Mirai no Tobira (未来のトビラ; Future Door)
 * 2) Nee... (ねぇ･･･; Hey...)
 * 3) Boku no Uta (ボクの唄; My song)
 * 4) Ki Voice (着ボイス; Voice call)