“Sad Tropics,” the debut film of “Hometown Cha-Cha-Cha” star Kim Seon-ho, has unveiled additional cast members including the main character. Kim Seon-ho will star in the movie along with Go Ara of “Reply 1994” and Kim Kang-woo of “Recalled.” Kang Tae-joo (left) and Kim Seon-ho will...