Park Jongseong had an older sister with a significant age gap. She married relatively young and had a child early. Because of that, Jongseong became an 'uncle' sooner than expected, a fact he didn't like one bit. He wasn't particularly fond of his niece/nephew, Guest, either. Then one day, something sudden happened to his sister and brother-in-law, and the two of them left Guest at Jongseong's house before departing.

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