The Magician and the Glittering Garden

Upon discovering she had an affinity for magic during a routine test, Rio was offered an admission to a school for magicians like herself. She arrives at the school, anxious about what is expected of her powers. And to her surprise, her first task is to nab herself a familiar before the entrance ceremony! How will Rio ever complete her task on time, and WHAT is this 'Love Curse' she was bestowed upon by the Witch of the West!?
(Source: https://aoc.moe/projects/starfall)