It should be
Halo probably didnt realize Roh's body shared the same birthday as him since he never asked/didn't probably care.
That's probably ain't the case because he see roh id and see his birth the first time he reincarnated
Wasn't it the case that he could understand Korean when talking and hearing but couldn't read it at first? (or i'm confusing this now for another series)
He can read korean. The confession song notebook from roh is in korean
Ah then I did confuse it. My bad. （/TДT)/
I am confuse, did Roh and halo have same birthday?