A male robot(my chara), was made to show off what a company could do, and became a huge hit and became the companies mascot, so they kept upgrading him, as they got better stuff, but then a rivaling company pop up and they often had fights, he was often safe from it until one day when someone got close enough to inject a virus, that would corrupt his programs, data and files. They called in several specialist in to try to fix him, but all said it was hopeless, and told them to erase everything including personality. But one girl(yours), who was determined to save him and keep the old him, she had meet him only once, but that one meeting was enough to make her determined to help him no matter what problems s turns up. and along the way she falls for him. She eventually fixes him too.
Yep, that's it pretty much it. and it's not all serious it can get goofy at times.
She of course needs to be nice, but the rest is open for your picking.
and this can go into mature.
I'll start it, unless you want too.