As we already know that both f(x) and Red Velvet will be making their comebacks this year, and today more details on their upcoming promotions have been revealed.

According to Sports Donga, f(x) will be returning as a 4-member group with a new album at the end of September. The infor has earned more credits as f(x) also announced that they will have a comeback this fall at '2015 London Korea Festival' as well as SM Entertainment when they gave their statement regarding Sulli's departure from the groups few days ago.

Red Velvet is also said to make a comeback in early September or early October unless there's a delay in the preparation process.

It seems we will be crammed up with comebacks from SM girls group this fall.