sentences:  The songs were composed to have a "wintry" feel, and the single ""Aruiteru"", their last single of 2006, was added to the track list.Since eighth-generation member Aika Mitsui did not officially join the group until December 10, three days before the EP was released, she did not participate in the recording.The EP features five tracks by solo and or smaller combinations of band members, the second Morning Musume non-single release since "Rainbow 7" to do so.