NaruSaku-Turn of Events

Everything was going well after the Attack on Konoha. Everyone was giving a helping hand but as Sakura Remembered the incident she couldn't help but feel weak and decided to do something about it. She walked through the town and knocked on the blondes apartment and asked him if he wanted to help her train. After arriving at the training grounds and training for a couple of hours something happens. The next day they are sent to a mission and are forced to share a motel room, what will happen and why does Naruto give sakura a piggy back ride.