Lucy was born with the ability to see what's in people's hearts, every emotion. Love, hate, sadness, anger, jealousy, sometimes even their past.
She can even see what's in her parent's hearts. Lucy could see love in her mom's heart, but not with her father.
Not after her mother's death. It's not like her father abused her, he just hated seeing her. And since he felt that way, she left. Ever since then Lucy has hated this ability.
It never crossed Lucy's mind to tell anyone about this ability Lucy has. So she never told anyone because she was afraid people would hate her for looking into people's privacy. She would just keep it a secret.
Now Lucy has joined a junior high all on her own, how will it go for Lucy and her ability to look inside people's heart like glass?