A lot of things from the novel was completely scrapped in the manhwa. For example, In the novel it was stated that Jaeha and Jaeho in fact does not resemble eachother at all because they're half siblings. Jaeha takes after his mother, while Jaeho takes after their father. It was also mentioned that Ikhyeong, their father had been abusing Jaeho since he was a kid yet never laid hands on Jaeha since he resembles his deceased wife which he'd loved. In addition, there was also this which added some fluff to the story but was completely missing in the manhwa. Jaeha has been going to a cooking academy to further his knowledge on it so he may serve delicious meals for Taegeon whenever he's home. In fact, Jaeha would always prepare dinner for Taegeon even if he weren't so sure that the other would even return. The manhwa lacks the detailed explanation that the novel, so it's easy to get confused while reading. Such a shame really. But I'm grateful, nonetheless. Otherwise I wouldn't have gotten my hands on the novel instead.