Fufu... Something formal and extra polite would be to call me by my last name with a formal honorific like -san afterwards, but that's so boring, and I resent my family name a little. You can call me "Eichi-kun" if you'd like. In your case, since you're older than me, it makes sense to use an honorific like that in this context.

So you see how it applies differently? But you know, I never minded you calling me by just my name. It's a little offensive, but I'm so used to hearing things like "Tenshouin-sama" and "Eichi-sama" and "President" and "Emperor," you know? I like to hear something a little closer.