The former model and actor became a member of South Korean boy band in 2016.
"We promise we will return someday, even more mature than we are now," Jungkook, a member of the K-Pop sensation, said.
"Because we were forbidden from yelling or singing, I could hear some fans letting out whimpers, as if trying to get out their emotions any way they could."
Kim Jaejoong claimed he'd been hospitalised with Covid-19. He later said it was a stunt to raise awareness.
They have experienced an intense amount of fame after becoming one of the world's most popular bands.
“K-Pop of the human rights movement" strikes a chord in a conservative country.
Here's everything you need to know about the two cases dominating Korean media.