D.O. has released the track “That’s okay” on the day of his military enlistment. The track is part of the third season of SM Entertainment’s digital music project, SM Station. He continues to impress fans with his soft yet soothing voice to make sure that fans will not forget him even during this hiatus. 

“괜찮아도 괜찮아 (That's okay)” is a soft R&B track that combines his voice perfectly with the acoustic guitar. D.O. took part in writing the lyrics that express the reassurance of letting go of painful emotions and that time will heal our pain. The track was released at the perfect time to let his fans know that he will be back soon to release new music. When he was enlisting in the military, his fellow EXO members were there alongside him to make sure that he will never be alone, just like the lyrics of the track.

The music video is made up of an animation that shows the daily life of a person who is going through a painful time in his life. The animation is in black and white to show the dark times that the character is going through. The reoccuring cactus shows that as long as you learn to let go of the pain, you will continue to grow just like the lopsided cactus that grew to be tall and colorful. D.O. has released his final track before enlisting in the military, so please continue to support him, as well as EXO, through this break!