"What exactly is a demon...?" The season of the biggest event in university life, the "cultural festival," has arrived! Naori and Hinata have decided to serve cocktails at the musical research club's booth. However, with the appearance of the mysterious handsome bartender, Tsukasa, and the high school girl, Isuzu, who openly harbors hatred towards demons, an unsettling atmosphere begins to loom... Can Naori shake off this slightly anxious situation properly!? The sixth volume filled with the hustle and bustle of the festival!