Group 100% released their video teaser for title video "Heart is Racing", which received a rating of R.

The teaser clip was released on 100%'s official Youtube channel on the 11^th; in the revealed teaser, Chanyong gazes piercingly into the camera, wearing a mask.

The video also features the members being chased by an unknown presence. Chanyong, who is locked up in a diamond-shaped glass case, is approached by a woman in a bodysuit; she is the same woman that kissed Chanyong. The short teaser is sufficient to pique curiosity about the storyline of the music video.

In the end of the clip, Chanyong rips his heart out, holding it in his hands. The teaser clip, bringing chills, reminds fans of a horror movie.

According to staff, the music video teaser received a rating of R because of the scene where Chanyong rips out his heart.

Meanwhile, 100% makes a comeback through Mnet's "M! Countdown" on the 13^th.