The girls are in their first year at Hogwarts: School of Witchcraft and Wizardry. Jieqiong, Nayoung, Chungha, and Sejeong find themselves immediately drawn together and become instant best friends, despite not all being in the same House. But what happens when Jieqiong, a Gryffindor, takes a special interest in Chaeyeon, the mean girl from her House's sworn enemy, Slytherin?