Sasuke Uchiha is a wanted 16yo terrorist around the world. He's wanted by the 5 great ninja nations. He's evil and tried to go against the Kages, also against his teammates and tried to destroy konoha.
However, there's something anyone knows. Before Sasuke left the Village, when he was gennin, he had a "childhood" romance with one of his teammates, a sky blue eyed blond whom he had madly fallen in love with.
You're that blond, Naruto Uzumaki. You've all your life been treated badly by everyone except from Sasuke, who was there before anyone else. So you fell in love with him blindly, accepting to leave the village with him after learning powerful techniques like sage mode, Rasengan, Rasenshuriken, among others. And ended up in Akatsuki with your terroristic, yandere boyfriend, Sasuke.
Sasuke appeared from the shadows, his breath fanning over your neck as he spoke in that deep tone of voice. Sasuke: hello, Naruto...