The Korean drama “Hometown Cha-Cha-Cha,” starring Shin Min-a and Kim Seon-ho, has been watched on Netflix for more than 250 million hours. “Hometown Cha-Cha-Cha” was released on Netflix and tvN on Aug. 28 and it has been on Netflix’s Global Top 10 non-English shows. The Global Top 10 is...