Rule 34 Dev - 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|19069643151