Rookie girl group Year 7 Class 1's "class president", Baek Sehee, has unfortunately suffered an injury and the group's comeback will ultimately be delayed. 

SEE ALSO: Comedian Hong Yoon Hwa clarifies that she lost weight without the help of injections

Recently, the group revealed on Facebook, "Year 7 Class 1, who was supposed to make a comeback on May 4, have decided to push back their comeback schedule due to class president Baek Sehee's ankle injury during dance practice.  We will post an official statement regarding the exact comeback schedule as soon as possible.  Thank you."

Their agency also spoke with the media to state in detail, "Right after the injury, Sehee acted as if she was fine and continued practicing, but her condition got worse and worse so she was taken to the emergency room. After her diagnosis came out, it revealed that her right ankle's ligament was severely torn." 

Ouch... sounds painful. We hope she feels better soon and makes a fast recovery! Meanwhile, you can check out the group's teaser photos here with the "bad student" concept.