I forgot about that part
I've been wondering since the beginning I thought that maybe it was just a spirit with her appearance because thinking that she just faked her death and he suffered for nothing got me mad
I doubt that was his grandma from the start, I mean look at her, she is an spitting image of Seoho if he got old
she probably died for real and it's her ghost being held captive not her living being
For years he thought his grandma was dead. And he went through life all alone and sad. Meanwhile she's held a captive inside a closets in his friend's house?!!!!