Kim Hyun Joong was revealed to have quietly enlisted in the military on May 12, but not before relaying a handwritten letter to his fans!  

He uploaded pictures of his letter onto his official fan cafe on the same day.  A portion of his message reads: "Failing to grasp an opportunity to comfortably greet you, I've ended up saying my farewells.  Honestly, during all this time, I had felt greatly apologetic. As a public figure, I was unable to speak my mind, so had to hold my breath. Everyday was hard for me as I reproached myself for not being more thoughtful and mature.

"During this confusing time, many people helped me out mentally.  I wondered with what words I could apologize to the people who were hurt by me and angry at me; it feels like I am leaving with a big amount of debt."

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He then also relayed his thoughts on the future.  He wrote, "Any man born on this land goes to the military, but as it's now my turn, a part of my heart is uneasy.  I believe that the next two years will be an opportunity for me to be reborn."

He also uploaded pictures of himself getting his hair cut for the service.