2girls, 4koma, ahoge, blush, book, brown_eyes, brown_hair, cat, comic, couple, curled_horns, demon_girl, demon_horns, demon_tail, eyebrows_visible_through_hair, hair_ornament, hand_on_another's_shoulder, heart, heartbeat, horns, indoors, living_room, long_hair, multiple_girls, open_mouth, pencil, pink_hair, school_uniform, shiny, shiny_hair, short_hair, sitting, statue, studying, tail, yuri