Responses
I think the kiss was non-sexual, just like how parents kiss their babies on the lips and young children kiss their siblings... I don't think people do this much in the West, but it's a pretty common way of showing simple affection where I'm from. I've even seen people kiss their pets on the mouth, just a small peck. ^^;
1) Did he just kiss a little girl on the lips? ಠ_ಠ
2) Does the little girl not realize she's a little boy pretending to be a little girl? But he doesn't see anything wrong with running away with Ran? I guess that's a child for you―not thinking ahead. ぐ( ̄ー ̄)