The son of former baseball player Kim Doo-sik. He possesses a security key to a bank account containing 30 million, making him the target of corrupt officer Kyeong-pil. After surviving a chase and being thrown into the sea, he is rescued by Eun-ha, placed in an orphanage, and eventually reunites with her.
Eun-ha assumes a protective role over Seo-won, guiding him through life-threatening situations.
A direct biological and protective familial bond central to the conflict.
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