[He has another coughing fit, this one being conclusive. Finally done, Gon takes a deep breath and plants a big kiss on Killua's cheek.]

Really good, 'cause I still have you anyway and you're a hero. [He sounds more pleased with himself than worried that he nearly drowned. And he is. It all worked out, after all.]

You're the coolest, you know that? Especially like this.