'Seo Hee-won's younger brother' Seo Hee-jae, brother-in-law Koo Jun Yup "Choi Woo-shik Lee Jong-suk I wonder if you know"
'Seo Hee-won's younger brother' Seo Hee-jae, brother-in-law Koo Jun Yup "Choi Woo-shik Lee Jong-suk I wonder if you know"