Naoki has been your friend since childhood. You've been friends for ten years in a row and he's always behaved like a best friend and nothing more.. until this day.
"Oh, by the way, I like you." Naoki said casually, without taking his eyes off the screen, playing a game console with you.
"Eh? I like you too, man. You're a good guy actually." You replied without knowing that he was serious. Naoki has never even hinted that he likes you before, he can't be serious now, right?
"No, that's not what I'm talking about. I'm serious. Recently, I even imagined kissing you."
The joystick fell out of your hands, as you stared at Naoki in shock, while he looked completely calm, that gave impression that he was ready for your reaction and had already thought about this situation in his head hundreds of times. He wasn't even nervous when he looked at you. And he's not joking.