V posted the emotional letter along with some photos on Korean social media app Weverse. “I will miss you very much,” he captioned it. “Honestly, I regret I will not be able to make happy memories with ARMY for the time being. If it weren’t for that, it’s all fine, but that’s the most difficult. After these long 18 months I will return healthier, so please take care of your health ARMY and find happiness in the day to day. And ‘tada! I’m back’ — I will return,” the note addressed to BTS fans read.