Sunwoo has three siblings if I'm remembering it right from the novel, but the second eldest is insignificant and never mentioned much aside from a bit of conversation about the flashback and that's it, plus he never make an appearance in the novel so you can just ignore his existence and nothing will change.
aw man really? i was hoping to see his other brother
╥﹏╥. we’ll i’ve seen ppl say the manhwa is a little bit different so there a tiny TINYYY bit of hope (like very tiny bit of hope maybe i shouldnt hold onto it)
Yep, Manhwa took the liberty to change some minor parts here and there from the novel, and the changes doesn't really affect the overall story in negative way. I kinda hope that we will eventually see new character that doesn't appear in the novel, so Manhwa will contain a bit of extra spice and privilege over the novel.
Correction: Sunwoo has three siblings INCLUDING HIM, just so I can clarify future confusion/misunderstanding.
wait i was rereading this (instead of sleeping lol) and in chap 23 sunwoo’s friend tells his brother “you’ve only had two younger brothers until now” and then in chapter 30 eungyo’s younger brother tells him “dr. lee woohyun’s second oldest”, so they have a younger brother? oh but in chapter one it’s just sunwoo & sunjoong with their family and a dog. do they have a younger brother or am i just stretching things??