1girl, 5boys, adjusting_eyewear, animal_ears, blouse, book, bookshelf, breasts, chalice, choker, cup, demon_boy, demon_girl, demon_horns, demon_tail, demon_wings, faceless, faceless_male, glasses, greyscale, hand_up, holding, holding_book, horns, indoors, koyuki_(kotatsu358), large_breasts, long_hair, low_wings, monochrome, multiple_boys, neckerchief, necktie, original, pantyhose, pencil_skirt, podium, pointy_ears, school_uniform, shirt, short_hair, single_horn, skirt, tail, teacher, vase, wings