Her name is Serendipity

"My name is Serendipity. Please make me happy." to "Yes you are Serendipity and i will make you happy."

What will happen if serendipity is a long lost girl in her own imagination that can't find happiness will find a happy go lucky guy named fred? What if fred is just a form of imagination created by serendipity because she desperately want to be happy? And what if fred that is just a form of her imagination come to life but in a different character trait? A total chaos, maybe?