A new year at Hogwarts mean new first year students arriving. Kim Seoyeon, an only child of a wizard and witch, left her mother and father behind to study at Hogwarts. Seoyeon befriends some girls on the Hogwarts Express who were also first years like her, and they eventually became a family who they could rely on. 

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As they venture into the magical world of witches and wizards, they face an incredibly dark force and find that the future of Hogwarts depend on them