Revolving Summoner

Brownie and Orangette, his childhood friend, are magicians. One day, they take a job interview for official magicians to be employed by the royal family. Orangette easily passes it, but Brownie fails.... He tries to summon a magician named Galette, but just her head appears. However, since Galette's power is strong, Brownie gets an extension on his test. One month left.... will he be able finish summoning Galette...?