Quite the angle of her ass we get on page 4...I'm sure if he saw that, he'd be all over her.
I like how her first conclusion was that he was a masochist and wanted to be tied up and all that, but it turns out it's the opposite, he's a bit more of an S and wanted to use it on her.
And she ended up basically going along with it until it's a natural part of their relationship now, I suppose.
Also, that ending...I want to see some doggy play, too!
I was about to comment about that Page 4 panel but I decided to see if anyone else did. That was the ass version effect of Page 6 of Kyockcho's Refined Senpai. Whew, those two are heavenly shots.