DON'T EVEN JOKE LAD

idk about korea specifically, but in some cultures, when you visit a grave, you can light a cigarette for them to “enjoy” in the afterlife. that’s why he placed it on the grave after lighting it; we don’t actually see him smoking one afterwards

I see!! Thank you so much for educating me patiently, i did notice he left the cigarette there after lighting it in his mouth, but just seeing it in his mouth made me anxious #－.－) sorry for yelling at u Taeseo my pookie......