Rule 34 Dev - 1girl angel_exercise arms_up blue_theme blunt_bangs blush bow chestnut_mouth eyebrows female_focus furude_rika gaou_(babel) higurashi_no_naku_koro_ni kneehighs long_hair monochrome monochrome_background musical_note pleated_skirt quaver semiquaver shirt simple_background sketch skirt socks solo suspenders|6183352305