When he communicates with ARMY he always does his best to be as honest as he can. He doesn't hide the emotions he is experiencing. He doesn't try to sugar coat it for his fans. It's a bitter pill but he's facing it head on. He came to say goodbye and he showed us he's ready for military enlistment with a buzz cut reveal on his own terms.
Even a buzz cut can't hide his beauty. He looks so so young. His years and experience belie this appearance and this will no doubt set him in good stead. Come back safely Jimin! We'll be waiting.
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I somehow feel reassured that everything will be okay. That's Jimin magic at work.