"Yumekui" is Ai Otsuka's 12th single under the avex trax label.

The b-side, which is a ballad named "tears", was also used in the movie.

During the first week, the single debuted at #5 with 63,428 copies sold, making it Otsuka's lowest debut sales of the year.

Although the single debuted with relatively low sales, it sold a total of 145,281 copies in 2006, making it the 66th best-selling single of the year.

All tracks are written by Ai OtsukaOricon sales chart (Japan)