``NIGHTINGALE'' refers to a nightingale, a bird with such a beautiful song that it is sometimes referred to as a Western warbler. In this work, it is depicted as a symbol of ``natural beauty,'' ``calmness,'' and ``tranquility.'' The jacket photo was a collaboration between members Classic 6 and photographer ayakaendo.
The MV, which will be released tonight at 8pm, depicts a world linked to the movie ``Soku Utau no Onna'', which uses ``NIGHTINGALE'' as the theme song. Please take a look.