@Kami_Nana I wrote this comment when I was only up to this point, and goddamn you're right.
Beta-Senpai actually made me sick reading the later chapters, like the literal ass-kicking scene made take a little break.
the basic rundown i have so far is that:
Nagatoro is a bitch, and doesn't realize she goes too far until its too late.
Senpai lets stuff happen but has set boundaries.