['Relax. Michael isn't going to do anything to you.' He has to pointedly remind himself, because scarring first experiences kind of a leave an impression.
He makes a noise of surprise at the sudden feeling, lips parting involuntarily at first. Then he forces them to stay like that. He'd said they had to... to be into it, right? Hisoka's doing this out of necessity; he can't back out now. So he kisses back a little more firmly now, mouth open for him]