You're getting it wrong. Idk bout the novel but here, it's not that he's happy diana talked to him and he felt guilty cause of it.
He felt guilty because he felt no emotions at all when diana talked to him.
He's saying something along "I feel guilty cause I don't feel any sadness or any feelings when she talked to me. After all, I used to love her with all my heart".
He's saying he's feeling rather indifferent to her talking to him. Which in turns make him feel guilty
I’m not getting it wrong cause I’m precisely comparing both.. That’s why I say it’s different from the novel. In the novel he feels bad that it felt “nice” taking to Diana and feels foolish about it. He still highlights that it affects him (to the point of getting sick afterwards) which is the opposite here, it was a clean cut. Although he does reassure Hess has no plans of ever leaving her, and cares for Hess :)
Let me dissect what was said for you cause I can assure you that my reading comprehension is completely fine and since the op tried to tell you the same thing as me and they wrote it (the original comment) I’m sure they know what they meant.
“It deviated from the novel a bit here” implying that the manwha has decided to not follow the novel precisely.
As for the rest of their sentence they are referring to what happened in the NOVEL “Kael got quite sick again and felt guilt that Diana talking to him still made him happy”
These are things that happened in the novel, him being happy talking to Diana and then feeling sick from guilt because he felt happy. (If you read the novel of have been reading the comments you might have seen this before)
Just saying
Let me dissect what was said for you cause I can assure you that my reading comprehension is completely fine and since the op tried to tell you the same thing as me and they wrote it (the original comment) I’m sure they know what they meant.
“It deviated from the novel a bit here” implying that the manwha has decided to not follow the novel precisely.
As for the rest of their sentence they are referring to what happened in the NOVEL “Kael got quite sick again and felt guilt that Diana talking to him still made him happy”
These are things that happened in the novel, him being happy talking to Diana and then feeling sick from guilt because he felt happy. (If you read the novel of have been reading the comments you might have seen this before)
Just saying
It deviated from the novel a bit :p here Kael got quite sick again, and felt guilty that Diana talking to him still made him happy..