Wonder Girls' Sohee teased 2AM's Seulong through Twitter the other day, making fans very curious.

Sohee replied to Seulong's Twitter on the 4th and said, "It's Seulong's Twitter. Seulong unnie-," Seulong replied, "Don't call me unnie." Sohee replied again, "I like Seulong unnie lol." (Unnie is what a girl calls an older girl/older sister) Seulong wrote on his Twitter, "I heard why I'm an unnie. Wah." It remains a mystery as to why Sohee calls Seulong unnie, but I'm guessing it's because he has chest muscles that are bigger than the average woman.