Hard to say, considering reading speed and hand-on-dick time varies... not that I would presume anyone here would do anything that uncouth.
I can say the line count is shorter than the previous two updates, but a good bit of Ch2Up2's line count was the code for the navigating around the club and the branching for who won each game. If I had to guess, it might feel on par with Ch2Up2 if you didn't take the time to go back and replay all the branching outcomes. Someone who has already played the update can correct me if I'm wrong.
This is a Hana/Mina/Kathleen centric update, so nothing major. That isn't to say Rosalind is completely absent in this one, as there is a fun (not sex) scene involving all 3 of the Carnations, but there's no major development in their plot lines. You can expect significant Rosalind content in the next update, as well as the week 2 exhibition one that follows it.