SEOUL - Tickets sold out in just five minutes for pop group Shinhwa's upcoming concert scheduled for March 16 and 17, according to their agency Shinhwa Company.The upcoming concert has been organised in celebration of the 15th anniversary of their debut, reported The Korea Herald. The six-member group, one of the early "idol" bands in the country, debuted in 1998 and enjoyed much popularity along with G.O.D., Fly to the Sky, H.O.T. and S.E.S.Tickets for the concert, about 25,000 of them, were sold out just five minutes after being released online on Wednesday, according to Shinhwa Company. "Some 300,000 online users visited the page right after the tickets became available," the company said.The group was initially formed under one of the nation's biggest entertainment and talent agencies, S.M. Entertainment, but the two sides ended their contract in 2003. After pursuing solo careers for many years, the members of the group together formed their own company, Shinhwa Company, in 2011.The concert, hosted by CJ E&M, is scheduled to be held on March 16 and 17 at the Gymnastics Stadium, Olympic Park in Seoul. The group is kicking off their Asian tour after the Seoul concert, and is planning to release a new album in April.