Lee Soo-man
In August 2010, Yunho and Changmin performed as TVXQ in Seoul's SMTown Live '10 World Tour, which was described to be an "experimental" stage for the duo. Earning strong and supportive reactions from the audience, Yunho and Changmin decided to continue TVXQ activities without the other three. There was an attempt to add new members to the group, but their mentor Lee Soo-man suggested that they should continue as a duo act.