If he kisses you on the lips and you don't kiss him back, it wouldn't typically be considered your first kiss, as a mutual exchange is often what defines the experience. Your participation in the kiss plays a key role in its significance. However, everyone has their own interpretation of what constitutes a "first kiss," so it's ultimately up to your personal feelings about the moment.
Kiss him back!
You kiss back!
If you like him, kiss him back!
Kiss him and see if he kisses you back.
Yes
they dont actually kiss but in episode 4 its like a kiss he has to kiss her to get medicine in her mouth and in episode 8 he kisses her on the nose and episode 24 he kisses her on the neck
if she kisses you back when you kiss her
If I were you, I would kiss him back.
Kiss her back. If she kissed you then she clearly wants you to kiss her too.
Do what feels good to you as you kiss him back.
Kiss him back and go out with him...
be happy and kiss her back.