Girl group Sunny Days have gone through member changes once again before they take part in the girl group competition in August. �For their last promotions, they had a total of seven members after adding two new ones. �

However, the newer members�Bichen and Gyuhee have left the group, and as a result�Jung Yoon was added to the group. Member Seoyeon will also be inactive during this album promotion due to health reasons, so Sunny Days will ultimately be making their comeback as five members. �

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On July 29, agency Haeun Entertainment released two teaser images for new member, Jung Yoon, who looks fierce and charismatic with dark and heavy make up as well as pitch black long hair with straight bangs.�

A rep said, "This beautiful and talented young lady has piercing eyes, nose, lips as well as a voluptuous appearance. �She is an accomplished lady, who won numerous awards in competitions and art festivals at school, and passed through an audition in which the odds were one against seventy to be added as the new member of Sunny Days."

The girls will be performing their comeback song "Half of the World are Men (literal translation)" on MBC's 'Show Champion' on July 30.