He is Kai member of new band EXO debut on 2011

She is Krystal Jung member of F(x) debut on September 5, 2009

They same company in S.M Entertaiment,but they got some rumors from fangirls of Kai said they dating and do 'that'. Their manager can't do anything because this is big problem and their member can't believe that rumors.

How about their career?