Ouma no Shoku ~Sei ni Tsukaeshi Yami no Guuzou~

At St. Rising Truth Academy, a prestigious university prep school known for its sacred teachings and volunteer work, the female faculty members have suddenly gone insane—and then vanished without a trace before the school can intervene. Seizing the chance for a scoop, protagonist Mibu Mutsuki and his twin sister Hazuki, the last members of the nearly defunct Newspaper Club, dive into the mystery. As they uncover the dark truth behind the disappearances, the shadows of evil creep ever closer to them both.