Gyakuten Majo Saiban: Chijo na Majo ni Sabakarechau The Animation

Based on the erotic game by Erectlip. A transfer student gets accused of being a pervert by the most popular girl in high school, who also happens to be a witch with massive breasts. Now he has two paths laid out before him: he can try to prove his innocence, or he can give in and embrace the his newly found reputation.