That is true, this Sung Hyunjae is much more extreme than in the novel. He is much more mature in the novel and respectful of Han Hoojin. That's one of the reason Han Yoojin looks up to him, despite his obvious shortcomings. And Goodness, do I love their dynamic in the novel(≧∀≦), Yoojin receives as much as he gives from Sung Hyunjae, they were equal in some way even before they became partners. I'm already preparing my heart to say goodbye to the lipstick and corset ╥﹏╥
yoojin wears and corset and veil in a scene (there’s reason for that) and there was so much sexual tension bw him and hyunjae at that time yoojin pours wine over his head and hyunjae holds his waist and bends over,, also before hyunjae looks pissed staring at yoojin’s neck bc there was a transendant’s mark there (all the happens pretty later in the novel) the sexual tension was soo heavy you could feel it oof
they didn't just make it less gay they also ruined sung hyunjae's characterisation he literally Laughs in the scene where they are having a conversation, he looks wary but soon is amused... not the dom daddy they're trying to make him to be