1.) When he walks away mad - Follow him
Naruto was glaring at him and he didn't know why. Though Sasuke kind of liked it when Naruto was angry, sporting those cute wrinkles on his nose and his red lips being pushed up in a pout, he didn't like the red color that flashed in his sapphire eyes.
That only meant that the blond was seriously pissed at him. But for what reason, he still didn't know.
"Did I do something wrong?" Sasuke asked, unsuccessfully hiding the desperation in his voice.
Naruto was taken aback, then he glared at Sasuke even more fiercely, his eyes flashing red and his pupils almost turning into slits, before he let out a "Humph!" and he turned on his heel, stomping away and leaving a confused Sasuke behind.
Wondering what exactly he had done wrong, Sasuke followed Naruto and found him standing in the hallway, leaning against the wall with downcast sapphire eyes. Swallowing thickly, Sasuke approached the blond and he was glad Naruto didn't turn away.
"I'm sorry," the Uchiha said, reaching out and grasping Naruto's hand, bringing it up to his lips and gently kissing it.
Naruto didn't move and Sasuke took it as an okay to hug him.
And still, he had no idea what he had done to make Naruto angry.