JYJ's Jaejoong will transform into "Dark Kyung Tak."

A photo of Jaejoong practicing his martial arts in the MBC drama "Time Slip Dr. Jin" was revealed. This hints the start of "Dark Kyung Tak," which is the total opposite from the flower boy sweetheart Kyung Tak.

The role Jaejoong plays is an official of the police bureau who is usually cold, but shows his sweet side when he is around a woman he loves. His character has become a much loved one among female fans.

On last week's episode of "Time Slip Dr. Jin," Jaejoong received much attention for Kyung Tak's romantic proposal to Hong Young Rae (Park Min Young), with whom he has been in love with for a long time.

In the photo released on June 23, Kim Kyung Tak in solely focused on his martial arts with an angry look on his face. This is a completely different look from his usual character. This change seems to be due to the love triangle that has been started by his lover Hong Young Rae who stopped Jin Hyuk from leaving in the 8th episode. There has been much anticipation about the changes Kim Kyung Tak will go through.