Nijikuro Gakuen no Nijichou: Seikatsu Shidou-hen
虹黒学園の日常 ~生活指導編~
A one-shot collab between Hatta Ayuko (Ookami Shoujo to Kuro Ouji) and Mizuno Minami (Nijiiro Days). Sata Kyouya is the school's guidance counselor and he has to deal with an odd group of students.