Boy group Teen Top's member Changjo revealed a picture taken with his older sister.

Today, Changjo posted on his Twitter, "Had a date with my mom but why picture with my sister?" along with a picture.

In the picture, Changjo was posing with his sister. They both showed off good looks.

Internet users who saw this commented, "Changjo's sister is so pretty," "They look alike," etc.

Photo Credit: Changjo Twitter