They're idols of the duo group called 'cross'
So uke is the cool beauty type, hard to get, beautiful and gracious
And seme is, well, the opposite, he's frank, blunt, positive, energized, is like a puppy, he does what feels like, he acts whatever he wants, you can't seem to hate him. He's adorable in a way xD
Kuchibiru ni Amai Doku