Responses
oops i meant to like, but ya i agree i think 704 either purposely said he didnt rmb so he keeps the scar or yama may have messed with his memories before entering the afterworld when he was asking him if he wanted to be renincarnated
I think Yama had something arranged with San, so he might not be dead.
And I think Yoon (704) said he didn't remember Geumseun so the scar related to him wouldn't be erased and he needed this for a reason.