Feng Che has a not too serious social disorder, well, not serious at all, at least he thinks so.
But obviously his twin sister Feng Qian doesn't think so: Isn't it serious to live a complete home life? Is it serious if you like to make your character look miserable in the game?
So, this is a story about a sister who is cruel on the outside and stupid on the inside, forcing her younger brother, who is cold on the outside but gentle on the inside, to have fun (to be happy (king)) and to play (to be domineering) in the game.
As for CP? The lilies are blooming at the foot of Brokeback Mountain.