A/N

Y/N is Charlie's 17 years old adopted sister. Charlie's parents adopted you when you were a toddler, because they felt that Charlie would need a girl around her age. After Charlie's dad (your adopted father) died, you tried your best to help Charlie the best as she can. Life was just boring, until one day on Charlie's 18th birthday, the girls got a yellow car. But it wasn't a car. It turned out to be a yellow robot from another planet. You and the robot become very close that soon the friendship turned into romance...