Why would the postcard edition be a BOX if it's just one postcard? Where's the sense for just one for a 50th release?
You guys are funny and cute.
So from the descriptions and the single theme:
Poppin'love cocktail - Enjoying a summer day, feeling refreshed from the daily routine.
V.I.P. - Celebrating in the club. Feeling strong and aggressive, let your power rise.
KO-SO-KO-SO - Being united with your loved one, dozing off satisfied and happily at dawn.
IN THE AIR - Getting lost in thought about the relationship, wanting to be there by the side of your love even in hard times, even though everything is great right now.
Well, something like that I get from all infos.^^