Rain has revealed that he has claustrophobia. He opened up about his fear of confined spaces in a recent video posted on Thursday on his YouTube channel, Season B Season. The video, titled “Rain’s Overseas Highlights: From Mongolia to Taiwan to Hong Kong, Treated Like a VIP,” follows the singer’s busy international schedule as he tours various countries. In the footage, Rain arrives in Taipei, Taiwan, before his performance. As he heads to the event venue, he reflects on his hectic travel schedule, saying, “It’s been non-stop—Australia, then Taiwan, and now, next up, Mongolia.” He also mention…