OK, I did some research and the first song on MX's mini is co-composed by Martin Hoberg Hedegaard, a guy who released the original version of Shinee's Love Like Oxygen. So it might be a cover from his only album from 2008, the same one the original Love Like Oxygen was on... And seeing how he wrote it on his own it should be a ballada.
But he made a comeback to the music world this year with a whole new sound (very Years&Years/britpop), so maybe he wrote something for them. Random but not impossible. And definitely better than o LLO like sing from 2008.
