I'm sure they could have easily passed it off as "Soohyun's mother married into the Lee family when he was --- years old" and just made it seem like Soohyun is Gangyoo's step-uncle or something, and that would be less awkward.. but no. They're still related by blood. They're still nephew and uncle, by blood.
Also, not to mention that Sanghoon just tried to fuck his half brother. Whut?
I'm sure they could have easily passed it off as "Soohyun's mother married into the Lee family when he was --- years old" and just made it seem like Soohyun is Gangyoo's step-uncle or something, and that would be less awkward.. but no. They're still related by blood. They're still nephew and uncle, by blood.
Also, not to mention that Sanghoon just tried to fuck his half brother. Whut?