It feels like it was a oneshot and didn't have the space to build things so it ended up rapey when that is not what she wanted.
The anime is better, very consenual. But mainly because he was able to excape the dog in heat that first night. The next day is as in the chapter except he drags him to bed then begs on his knees to please eat him. Literally begs and with puppydog eyes too. Then the after sex stuff appears as in the story.
Basically, this reminds me of Viewfinder. Started off as a topic oneshot then got popular so it was serialized and so she tried to find a way to turn the story into a consensual love story.
It is a side effect of how things get serialized due to oneshot promos...happens in tv a lot with pilots, sometimes things are so bad they completely reshoot the pilot with new actors.
It is why I give things a few chapters/eps to see where the story is going.
This one is mainly horny dog will do anything to please eat his tsundere twisted master and misunderstandings abound.
After all, he recorded not for blackmail but his own spank bank and the other offered up 'anything'...so he decided to call in the chip. Never promise someone anything unless you mean it.

Wow. This is highly upsetting I had to stop.