I Want to Be a Receptionist in This Magical World, Vol. 6 (manga)

Having returned safely from the Sea Nation, Nunnally and her friends begin settling back into their normal lives. At Harre, the director informs every one of her plan to enter the quinquennial Walhelnus - an intercontinental magic tournament promising fame and prestige to the winners in hopes to boost applications. Meanwhile, Benjamine comes to Nunnally and Nikke for help with Satanas’s recent odd behaivor. The three go undercover at a favorite bar of his to investigate… only for Nunally to be immediately discovered by Rockmann!