After a scolding from the class president for his post-lunch nap, Haruaki Abe, under Kaoru's directive, tidied up the area near his desk. As he exited the classroom, he encountered Tsukimiya Shie, known for her unconventional attire and rebellious reputation. To his surprise, she vanished before his eyes while descending the stairs. Perplexed by this odd occurrence, Haruaki ventured to the back of the staircase, unwittingly stumbling into the clandestine mysteries of Beni Academy.