Those were taken by a popular photograph (I personnally don't know him at all ahah), Yonehara Yasumasa. The concept is "private and sexy atmosphere". He took around 3000 pictures and carefuly picked the 'best', which you'll be able to find in the 36pages photobook version.
The song is described as groovy with disco sounds and catchy lyrics. They also mention the use of guitars and bass.
|