Along with the post, J-Hope added a message that read, “Thank you. Keep it up, Jin." For the night, Jin dressed up in a white T-shirt with classic denim blue jeans and an off-white shirt to layer up.

It all happened when J-Hope was midway through his setlist. First, Jungkook walked out, joining J-Hope for I Wonder. Later, Jin appeared and the crowd erupted in cheers. In a sweet surprise for fans, ...