"EXO" Chen is making a stylish comeback.

Chen released the poster titled "Empty" the title track of his fourth mini-album "DOOR," on his official SNS on the 20th. He showed off a sophisticated atmosphere.

Chen presented his calm charisma in an all-black outfit. He looked at the camera with empty frame props in the background. It raises questions about the title song.

"DOOR" is Chen's first new album in a year and six months. Attention is focusing on what kind of music he will release following "April and A Flower," "Dear My Dear," "Hello" and Last Scene."

Meanwhile, Chen will release his fourth mini album "DOOR" on various music sites at 6 p.m. on the 28th.

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<Translated by=Meenyoung Lee>