Question for those who've read / are reading the NO. 6 series:

//Possible spoilers for Vol. 5//

I’m currently on Vol. 5; 1-4 weren’t exactly easy, but they weren’t so difficult that I felt like I wasn’t understanding anything. However, Vol. 5 is kicking my butt, especially after Nozumi and Shion enter the correctional facility.

I was wondering if the later books are just as hard, or more difficult? I don’t really wanna put the series down half way through, but I fear imma have to hold off 6-12 months to continue the series.