cute but how did this pairing start?

One of her moves in IAMP is a blatant ripoff of one of his moves.

Dunno if that's the real origin of this pairing, but probably.

Sakuya: "Hey China. Where did you learn that move?"
Meiling: "It... It was when I was younger. Before I came here..." *stares off dreamily* *rumours spread throughout the mansion, then through all of Gensenkyo*

Really tho, Krizzy has some pretty smooth lines.