B'z's COMPLETE SINGLE BOX were also amazing in the way they were done
http://bz-vermillion.com/news/170629.html
Both B’z COMPLETE SINGLE BOX Black & Trailer Versions are not cheap but the way Being marketed and created them let alone the content on what you get , it was real epic
Somemore , B'z only started to release CD + DVD versions of their albums and singles in 2009 which's considered late as they've been in the business since 1988
I don't know if Kuu would consider to do something like this but it would make a statement in celebration of her 20th anniversary this year