I Want to Be a Receptionist in This Magical World, Vol. 3 (manga)

At last, Nunally has her dream job working in the Hall! But even now, she can-t seem to untangle herself from her longtime rival, Rockmann! One day, the Order of Knights requests her help investigating an area where missing people had been found. But she comes to discover that Rockmann is part of the group too! What-s worse- he-s spending every free moment teasing her along the way...