Lycèe De Cinq Flèches

It is a prestigious high school in Vietnam for only girls run by the Cinq Fleches group. The school is chaired by Karl Fei-ong and the matron of the hostel is Ms. Lee. After George's death, Saya decides to kill chiropterans and her first mission takes her to this place in pursuit of project Delta-67 ~ in other words to find out the whereabouts of Diva. So, she assumes the identity of a student and gets admitted in the Lycee. Hagi follows her, disguised as a gardener. Here, she meets the phantom. During the grand ball, she meets Solomon who has been invited here.