Watch Open Sisters with English subtitles free online on DramaKH. Yoo-seok receives a farewell notice from Siwon. Yoo-seok, who was drinking, used to match Siwon and San Lotto in the past. The rest of the numbers are kept by Siwon. Yoo-seok telling the truth to Siwon, Siwon tries to take away Yooseo