SEE ALSO: Park Ji Yoon comes back with 'Mr.' teaser

Park Ji Yoon looks straight at us with her charismatic eyes as she shows some skin, hinting on her return to a possible sexy concept. The veteran singer has also recruited big names including her agency's very own Yoon Jong Shin who participated as a producer for the album. 

Her agency Mystic89 stated, "Park Ji Yoon plans to release four single albums throughout the next year and conduct various activities with the help of some of the best producers." True to their word, Yoon Jong Shin and Primary teamed up to create two tracks for 'Mr.' with the title track, "Mystery", which is created by Primary.

Park Ji Yoon will call out to her 'Mr.' when it's released on the 21st!