Well, Jaspar mentioned in an earlier chapter he was quite sickly before and always had to go to the hospital. As for why Jaspar is no longer a Jang, we know in a flashback that Jasper's dad and mom are divorced after finding out the dad was cheating, so they probably changed last names after that. Also they were like 4, not a lot of people really remember much at that age, especially when both went through so much trauma after that
ohh the changing of surname does make sense but i wonder why he didnt remember that he was a former jang considering how he knew about his parents' divorce. hart mentioned that he met a jasper jang when he was a kid but jasper didnt seem to react much. ur insight about my questions is really great tho!
wtfff i was shookedth when it said fin like whatt??? this aint it. first of all, what was the reason why they're both in the hospital when they were little kids? especially hart likeee why does he need a major surgery and why did jasper forget him when he said he's good at remembeing names? and why did jasper thought his surname was jang. this may be insignificant but i want to knowww and wHERE IS THE WINTER SEA CHAPSSS huhu overall this manhwa is so good but maybe they shouldve made a better ending T_T