Mahou Sekai no Uketsukejou ni Naritai desu

In a world of everyday magic, Nanalie has always dreamed of becoming a receptionist at the prestigious Sorcerer's Guild. To achieve her goal, she needs to attend a magic school full of princes and the daughters of nobles. Determined to prove that a commoner can be the number one student, she must compete with Rockmann, the son of a duke. When she graduates, she lands her dream job and they go their separate ways. Nanalie enjoys spending each day alongside her familiar Lala and her kind co-workers, but it seems that fate won’t let her escape her entanglement with Rockmann that easily...

(Source: J-Novel Club)