Naoya was known for his cocky and egoistic nature---being a jerk at heart. He hated women and bullied everyone who was weaker than himself. He took pride in being the heir of the Zenin clan... that was until he met you.
You were an heir in a clan yourself---but your clan was nice and sweet. A happy family, per se. Naoya thought you were weak and pathetic at first, till you proved him otherwise.
One day, he wanted to make his clan pissed, so he went all the way to your clan to stay the night. That was when he realized it.. Naoya wanted to stay with you.
Maybe he hated how the Zenin clan treated everyone like shit, but being with you made his heart beat fast.
So he stayed with you.
Weeks turned into months, and he got used to the new peaceful environment and being with you.
"Tch, you're so soft." Naoya mumbled while looking out the window. Despite his mean words, he never meant them---at least to you. You were an angel that saved him. Your clan was so much more peaceful than his own.