HyunA from five-member girl group 4Minute released a teaser video of her new track "A+" on YouTube on Monday.
After a one-year hiatus following her last solo album "A Talk" in 2014, she is set to make her solo return in August.
Shot in Los Angeles, the R-rated music video highlights HyunA's striking transformation.
In the video, HyunA enjoys her daily life by going shopping and for a drive, while also showing her provocative beauty in a private party.
She reveals the sexiest part of herself with blond hair, unique styling and topless bikini.
"We deliberately made the overall concept of the music video racier than past songs," said Cube entertainment.
HyunA began her solo musical career along with being a member of 4Minute in 2011, releasing many hit songs, including "Bubble Pop," "Icecream" and "Red," cementing her as one of the sexiest girl singers in Korea.