Changsub is the next BTOB member off to the military.

On the afternoon of January 14, Changsub entered the training center for his mandatory military service. He decided to enlist quietly, so the time and location of his enlistment were not publicized.

Ahead of his enlistment, he revealed a selfie on Instagram with his hair cut and wrote, “I will be back. YeJiApSa.” YeJiApSa is a shortened term that BTOB members use for a phrase that means, “I loved you then, I love you now, and I will continue to love you.”

Before leaving, he took time to meet up with his ’91-line friends. The photo posted by Hoya on January 14 also includes Apink’s Chorong, B1A4’s Jinyoung, and MAMAMOO’s Solar.

Dancer Jin Jae Won shared a video on his Instagram story of Changsub saying goodbye to family and friends as he enters the training center. Choreographer DOOBU also posted a video.

Changsub is the second BTOB member to enlist following Eunkwang in August 2018. The next member to enlist will be Minhyuk on February 7.

Wishing Changsub a safe service!