M+ is a bit different in a few ways, first, the triangle consists of 3 adults, second, they all know each other from their youth. What I find interesting is Myung choose Guld 7 years earlier but secretly wanted to be with Isamu more. And in the end Myung and Isamu are together and Guld ends up as space debris orbiting Eden! Sucks to be him, I'd rather end up like Minmay or Mao....alone but alive.