Fun fact, Shiina Kaede sensei was voiced by one of the best anime voice actress of all time, the va is the Goddess Itou Shizuka she is famous for voicing many famous characters such as Himejima Akeno High School DxD, Morishima Haruka from Amagami SS, Irina Jelavic from Assassination Classroom, Hildegard in Beelzebub, Luviagelita in Fate Series, Koko from Jormungand, Kobayashi Rindou from Food Wars and many more ! , as you can see not many famous voice actresses involved in H Anime, some famous VA do voicing H anime but usually they used other name, dont let their real name appear in the credit, but itou shizuka is different beast, she didnt even try to hide her name in the credit, btw i dont know how the production managed to get her to work in H anime xD.