Roy Kim's way of greeting was revealed.

A staff member of Mnet "Superstar K4" posted two pictures of the contestant with the caption, "The gentleman Roy Kim's distinguished way of greeting for guys and girls."

In the revealed pictures, Roy Kim greeting Jung Joon Young and Ahn Ye Seul are different. With Jung Joon Young, who is male, he chest-bumped, showing a manly greeting. But with Ahn Ye Seul, he bowed and shook her hand.

Internet users who saw this commented, "It's clearly different," and "Isn't it because he's close to Jung Joon Young?"

Photo Credit: Mnet Twitter