Blame it on the Star

Jamie is the top psychologist that has been on many tv shows with his brilliant knowledge of human emotions and behaviours and has treat many people with mental illness. He can observe and interpret the human behaviour easily and has the title of "Human Library", but why? Why can't he observe and predict that one person who suddenly appear on his life. What is his motive?
Samuel is the fallen angel that are send from another stars to collect the last sorcerer stone to finally break free from his curse. He is attractive, charming, handsome and is the dream of every man and woman. But why? Why that person didn't even flinch a bit when he flirt with him? They say love comes in an unexpected way, but will it fully bloom for two person who cautious of each other? I will say I don't know, but rather blame it on the stars.