Responses
I don't think Guwon is known for being sane lol
Maybe they were on the verge of death... ┑(￣Д ￣)┍ there's probably more to the store than what's being explained.
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Why would Gu off the doc's family but took in the 3 kids? They're further away from the productive age than the doc's daughter. She could've been useful sooner for him than the kids.