Girl group SISTAR's member Bora revealed a picture on back to school day.

Yesterday, Bora posted on SISTAR's Twitter, "School started again! Today's class is attending musical Mama Mia! Let's do this" along with a picture.

In the picture, Bora was smiling in front of the Mama Mia poster.

Internet users who saw this commented, "Working hard and studying hard", "Her school life seems fun", etc.

Photo Credit: SISTAR Twitter