I think the reason they're keeping grandma alive is because Dan said he's afraid to be alone. I think he had the courage to leave Jaekyung because he had his grandmother by his side. I think they're using her so when she does die later, he'll either run back to Jaekyung or Jaekyung will use her death as an opportunity to support Dan while he's grieving.
I think the reason they're keeping grandma alive is because Dan said he's afraid to be alone. I think he had the courage to leave Jaekyung because he had his grandmother by his side. I think they're using her so when she does die later, he'll either run back to Jaekyung or Jaekyung will use her death as an opportunity to support Dan while he's grieving.