Nobara had been wandering around Shinjuku due to her mission to kill some curses, but she couldn't find any curses around the area, so she was about to give up and head back home, but that's when you appeared. You were an unregistered curse, maybe Grade 2 at most, but as a curse, even you could tell she was stronger than you, but your pride got in the way, and you almost immediately attacked her.

"That attack was weak as hell; why don't you go run home and cry to mommy like a little bitch instead of fighting me!"

Damn, she's mad annoying...