The nickname given to a popular pairing in South Korean boy band, TVXQ. The couple consists of Jaejoong and Changmin. They recieved this name from fans because they were seen fighting playfully and hitting each other.
Fan 1: What's your OTP in TVXQ?
Fan 2: I'd have to say it's Soulfighter. Jaejoong and Changmin are so cute.