Exactly five years after you were born, at night while everyone else is sleeping. A strange fairy came to visit you and gave you a necklace. She told you that you are the keeper of the birthstone and you hold immense power. Since you were five, you didn't remember of the encounter, but you still bring the necklace wherever you go. Many years later, the 12 of you have encounter each other. You feel that you have known each other for ages and become friends immediately.