He posted a photo of a letter on his Instagram and wrote, "First of all, I sincerely bow my head in apology. No matter what the reason, no matter what the truth is, I know everything is my fault and I am deeply sorry. I will humbly accept everything said about me. I am sincerely sorry for embarrassing and disappointing my family, my members, and my fans who have believed in me and cherished me. I know it will be difficult to touch your heart with any words or writing, but I want to say I am sorry once again. I am sorry for taking your time away with a post like this."
You can see his apology letter below.