Locked Heart (READ UNTIL END PLEASE!)

THIS BOOK HAS BEEN ADOPTED!!! I HAVE ADOPTED THIS BOOK AS MY OWN FROM DERPY_NEKO!!! She is the original author who has discontinued her book.
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Lucy is the lock heart demon of the guild Love and Lucky. She hasn't shown real emotion ever since she was a little. But when the grand magic games come up and some boys particularly have their eye on her. Will they be able to bring out real emotion in this girl and remove the lock from her heart? or will Lucy remain an emotionless person forever?