Kazuma-lite being anxious of all the girlies her male thot-slaying equivalent has attracted is one of the cutest things ever. Attraction wise, there's no way Kazzy boy would lower himself to Aqua or Darkness unless in a moment of weakness, and he's too much of a goody-two shoes to go all the way with YunYun or Wiz (too manipulative in order to get them), so my money is on Chris or even Lean, since they are also female equivalents to him.