Seems like there's a lot of confusion, so to clear things up:
Pure Water Adolescence (the original oneshots) were re-released in a "complete" volume last year. At the same time, a new compilation volume titled Pure Water Luminescence was released as well. Within Pure Water Luminescence is two things: Paradise, And After..., a completely separate series with different characters; and the sequel to Pure Water Adolescence, confusingly also titled Pure Water Adolescence.
Both of these series were originally published only on Rakuen Le Paradis' webcomic portal, whereas the FIRST Pure Water Adolescence oneshots were published many years ago in the print anthology magazine.
You can view the table of contents for Pure Water Luminescence here: https://dynasty-scans.com/chapters/paradise_and_after_ch01#4
Anything not included in that Table of Contents belongs to the "first" series.
Hope that clears things up!