So Kurumi speaks with a lisp or slurs her speech most of the time? It could be from how nervous and shy she is, but nothing about it is in the wiki. I thought it was only when she's crying, but it seems that most of the comics with her in it have some sort of slurred or lisping speech. It's cute.

The last panel always gets me with Risa being like "That's it, I'm done!" after realizing she may not be able to beat Kurumi in the whole sexy thing she was getting into with Wakaba XD