Nothing to spoiled on this scene actually it just that it's more detailed in novel compared to manhwa. Like, you can read their monologue about anything they do. For example the smoking scene and why he smoked to this scene (I actually forgot since it's been so long since I've read the novel) but as far as I could remember, he smoked here because he wanted to still feel the ml or something. I really forgot but it's better to read the novel for you to feel and understand their action from manhwa because in manhwa they don't really put the full details and monologue in manhwa

an uke who smokes??????????? SMASH SMASH SMASHH