1girl, aoki_ruri, blush, brown_eyes, cardigan_vest, collared_shirt, dragon_girl, dragon_horns, fangs, finger_in_own_mouth, grey_hair, horns, kink_(tortoiseshell), looking_at_viewer, medium_hair, necktie, open_mouth, polka_dot_necktie, ruri_dragon, school_uniform, shirt, slit_pupils, solo, teeth, tongue, upper_body