f(x)'s cute member Sulli's unexpected past was captured.

Recently, a set of captured photos were posted on an online community board with the title, "Sulli's unexpected past when she used to chew on soju cups."

In the revealed photo, Sulli is a child actress in a movie. Sulli is violently chewing on a shot glass in her right hand. However, her pale skin, round eyes and round cheeks still remain the same.

Internet users commented, "Sulli's unexpected past?", "I'm sure that's sugar...", "Even her rebellion is cute", "Sulli also gets angry..."and "You can't get mad at her because she's so cute."