Demon Busters: Ecchi na Ecchi na Demon Taiji THE ANIMATION

Based on the erotic game by Moonstone Cherry. Kou is a member of the public morals committee at Moriyaji Gakuen, along with his osananajimi Ai and kouhai Karen. One day while he was making the rounds after school, he was attacked by a weird being. He was frozen in fear and could not evade its attack