Yeah the smut is bad. Haedong looks terrified the whole time, Yongwoo suddenly goes from green flag to typical shitty seme after being so gentle and considerate the whole time. Zero foreplay, not even a single kiss. It felt forced in way earlier than made sense. I guess that applies to both the story and his dick actually.
The power dynamic becomes really uncomfortable once sex is pushed onto Haedong as well; all of this started because he stole from Yongwoo so there's a feeling of not being in a position to refuse, either out of guilt or because Yongwoo could decide to turn him in at any point.

I liked it till chapter 26, all that smut came out of nowhere. And I thought the tiger would be nicer once it came to it. Kitty seems scared and mentally unprepared, they didn’t talk anything through and he’s pushy.